diff --git a/qt5-qtwebkit.spec b/qt5-qtwebkit.spec
index e248e2c..de87a8b 100644
--- a/qt5-qtwebkit.spec
+++ b/qt5-qtwebkit.spec
@@ -13,7 +13,7 @@
 Summary: Qt5 - QtWebKit components
 Name:    qt5-qtwebkit
 Version: 5.4.0
-Release: 3%{?dist}
+Release: 4%{?dist}
 
 # See LICENSE.GPL LICENSE.LGPL LGPL_EXCEPTION.txt, for details
 # See also http://qt-project.org/doc/qt-5.0/qtdoc/licensing.html
@@ -48,6 +48,9 @@ Patch7: 0001-Add-ARM-64-support.patch
 # truly madly deeply no rpath please, kthxbye
 Patch8: qtwebkit-opensource-src-5.2.1-no_rpath.patch
 
+# fix GMutexLocker build issue
+Patch9: qtwebkit-opensource-src-5.4.0-mutexlocker.patch
+
 %if 0%{?system_angle}
 BuildRequires: angleproject-devel angleproject-static
 %endif
@@ -124,6 +127,7 @@ BuildArch: noarch
 %endif
 %patch7 -p1 -b .aarch64
 %patch8 -p1 -b .no_rpath
+%patch9 -p1 -b .MutexLocker
 
 echo "nuke bundled code..."
 # nuke bundled code
@@ -203,6 +207,9 @@ popd
 
 
 %changelog
+* Tue Feb 17 2015 Than Ngo <than@redhat.com> 5.4.0-4
+- fix GMutexLocker build problem
+
 * Tue Feb 17 2015 Rex Dieter <rdieter@fedoraproject.org> 5.4.0-3
 - rebuild (gcc5)
 
diff --git a/qtwebkit-opensource-src-5.4.0-mutexlocker.patch b/qtwebkit-opensource-src-5.4.0-mutexlocker.patch
new file mode 100644
index 0000000..2ad951d
--- /dev/null
+++ b/qtwebkit-opensource-src-5.4.0-mutexlocker.patch
@@ -0,0 +1,219 @@
+diff -up qtwebkit-opensource-src-5.4.0/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp.than qtwebkit-opensource-src-5.4.0/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp
+--- qtwebkit-opensource-src-5.4.0/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp.than	2015-02-17 15:22:29.921309725 +0100
++++ qtwebkit-opensource-src-5.4.0/Source/WebCore/platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp	2015-02-17 15:26:05.340557547 +0100
+@@ -354,7 +354,7 @@ static void webKitWebSrcSetProperty(GObj
+ 
+     switch (propID) {
+     case PROP_IRADIO_MODE: {
+-        GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++        WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+         priv->iradioMode = g_value_get_boolean(value);
+         break;
+     }
+@@ -376,7 +376,7 @@ static void webKitWebSrcGetProperty(GObj
+     WebKitWebSrc* src = WEBKIT_WEB_SRC(object);
+     WebKitWebSrcPrivate* priv = src->priv;
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     switch (propID) {
+     case PROP_IRADIO_MODE:
+         g_value_set_boolean(value, priv->iradioMode);
+@@ -429,7 +429,7 @@ static gboolean webKitWebSrcStop(WebKitW
+ 
+     ASSERT(isMainThread());
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+ 
+     bool seeking = priv->seekID;
+ 
+@@ -493,7 +493,7 @@ static gboolean webKitWebSrcStart(WebKit
+ 
+     ASSERT(isMainThread());
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+ 
+     priv->startID = 0;
+ 
+@@ -584,7 +584,7 @@ static GstStateChangeReturn webKitWebSrc
+         return ret;
+     }
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     switch (transition) {
+     case GST_STATE_CHANGE_READY_TO_PAUSED:
+         GST_DEBUG_OBJECT(src, "READY->PAUSED");
+@@ -615,7 +615,7 @@ static gboolean webKitWebSrcQueryWithPar
+         gst_query_parse_duration(query, &format, NULL);
+ 
+         GST_DEBUG_OBJECT(src, "duration query in format %s", gst_format_get_name(format));
+-        GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++        WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+         if (format == GST_FORMAT_BYTES && src->priv->size > 0) {
+             gst_query_set_duration(query, format, src->priv->size);
+             result = TRUE;
+@@ -623,7 +623,7 @@ static gboolean webKitWebSrcQueryWithPar
+         break;
+     }
+     case GST_QUERY_URI: {
+-        GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++        WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+         gst_query_set_uri(query, src->priv->uri);
+         result = TRUE;
+         break;
+@@ -668,7 +668,7 @@ static gchar* webKitWebSrcGetUri(GstURIH
+     WebKitWebSrc* src = WEBKIT_WEB_SRC(handler);
+     gchar* ret;
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     ret = g_strdup(src->priv->uri);
+     return ret;
+ }
+@@ -683,7 +683,7 @@ static gboolean webKitWebSrcSetUri(GstUR
+         return FALSE;
+     }
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+ 
+     g_free(priv->uri);
+     priv->uri = 0;
+@@ -719,7 +719,7 @@ static const gchar* webKitWebSrcGetUri(G
+     WebKitWebSrc* src = WEBKIT_WEB_SRC(handler);
+     gchar* ret;
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     ret = g_strdup(src->priv->uri);
+     return ret;
+ }
+@@ -734,7 +734,7 @@ static gboolean webKitWebSrcSetUri(GstUR
+         return FALSE;
+     }
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+ 
+     g_free(priv->uri);
+     priv->uri = 0;
+@@ -772,7 +772,7 @@ static gboolean webKitWebSrcNeedDataMain
+ 
+     ASSERT(isMainThread());
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     // already stopped
+     if (!priv->needDataID)
+         return FALSE;
+@@ -793,7 +793,7 @@ static void webKitWebSrcNeedDataCb(GstAp
+ 
+     GST_DEBUG_OBJECT(src, "Need more data: %u", length);
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     if (priv->needDataID || !priv->paused) {
+         return;
+     }
+@@ -807,7 +807,7 @@ static gboolean webKitWebSrcEnoughDataMa
+ 
+     ASSERT(isMainThread());
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     // already stopped
+     if (!priv->enoughDataID)
+         return FALSE;
+@@ -828,7 +828,7 @@ static void webKitWebSrcEnoughDataCb(Gst
+ 
+     GST_DEBUG_OBJECT(src, "Have enough data");
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     if (priv->enoughDataID || priv->paused) {
+         return;
+     }
+@@ -842,7 +842,7 @@ static gboolean webKitWebSrcSeekMainCb(W
+ 
+     ASSERT(isMainThread());
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     // already stopped
+     if (!priv->seekID)
+         return FALSE;
+@@ -860,7 +860,7 @@ static gboolean webKitWebSrcSeekDataCb(G
+     WebKitWebSrcPrivate* priv = src->priv;
+ 
+     GST_DEBUG_OBJECT(src, "Seeking to offset: %" G_GUINT64_FORMAT, offset);
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     if (offset == priv->offset && priv->requestedOffset == priv->offset)
+         return TRUE;
+ 
+@@ -879,7 +879,7 @@ static gboolean webKitWebSrcSeekDataCb(G
+ void webKitWebSrcSetMediaPlayer(WebKitWebSrc* src, WebCore::MediaPlayer* player)
+ {
+     ASSERT(player);
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     src->priv->player = player;
+     s_cachedResourceLoader = player->cachedResourceLoader();
+ }
+@@ -906,7 +906,7 @@ char* StreamingClient::createReadBuffer(
+     mapGstBuffer(buffer);
+ #endif
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     priv->buffer = adoptGRef(buffer);
+     locker.unlock();
+ 
+@@ -921,7 +921,7 @@ void StreamingClient::handleResponseRece
+ 
+     GST_DEBUG_OBJECT(src, "Received response: %d", response.httpStatusCode());
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+ 
+     // If we seeked we need 206 == PARTIAL_CONTENT
+     if (priv->requestedOffset && response.httpStatusCode() != 206) {
+@@ -1020,7 +1020,7 @@ void StreamingClient::handleDataReceived
+     WebKitWebSrc* src = WEBKIT_WEB_SRC(m_src.get());
+     WebKitWebSrcPrivate* priv = src->priv;
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+ 
+     GST_LOG_OBJECT(src, "Have %d bytes of data", priv->buffer ? getGstBufferSize(priv->buffer.get()) : length);
+ 
+@@ -1074,7 +1074,7 @@ void StreamingClient::handleNotifyFinish
+ 
+     GST_DEBUG_OBJECT(src, "Have EOS");
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     if (!priv->seekID) {
+         locker.unlock();
+         gst_app_src_end_of_stream(priv->appsrc);
+@@ -1210,7 +1210,7 @@ void ResourceHandleStreamingClient::wasB
+ 
+     GST_ERROR_OBJECT(src, "Request was blocked");
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     uri.set(g_strdup(src->priv->uri));
+     locker.unlock();
+ 
+@@ -1224,7 +1224,7 @@ void ResourceHandleStreamingClient::cann
+ 
+     GST_ERROR_OBJECT(src, "Cannot show URL");
+ 
+-    GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
++    WebCore::GMutexLocker locker(GST_OBJECT_GET_LOCK(src));
+     uri.set(g_strdup(src->priv->uri));
+     locker.unlock();
+