diff --git a/0001-gtk3-wayland-wrong-dialog-sizes.patch b/0001-gtk3-wayland-wrong-dialog-sizes.patch
new file mode 100644
index 0000000..eec1886
--- /dev/null
+++ b/0001-gtk3-wayland-wrong-dialog-sizes.patch
@@ -0,0 +1,56 @@
+From 585507a4127ff91d9360ca16938dbd36153aef0d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolanm@redhat.com>
+Date: Tue, 1 Dec 2015 13:27:21 +0000
+Subject: [PATCH] gtk3+wayland: wrong dialog sizes
+
+use inner container, not outer toxic toplevel
+
+Change-Id: I44f2fe1e8e346e51e65158f7864293ef37732345
+---
+ vcl/unx/gtk/gtksalframe.cxx | 10 ++++++----
+ 1 file changed, 6 insertions(+), 4 deletions(-)
+
+diff --git a/vcl/unx/gtk/gtksalframe.cxx b/vcl/unx/gtk/gtksalframe.cxx
+index 791e04e..d147b49 100644
+--- a/vcl/unx/gtk/gtksalframe.cxx
++++ b/vcl/unx/gtk/gtksalframe.cxx
+@@ -943,22 +943,24 @@ void GtkSalFrame::moveWindow( long nX, long nY )
+ 
+ void GtkSalFrame::widget_set_size_request(long nWidth, long nHeight)
+ {
++#if !GTK_CHECK_VERSION(3,0,0)
+     gint nOrigwidth, nOrigheight;
+     gtk_window_get_size(GTK_WINDOW(m_pWindow), &nOrigwidth, &nOrigheight);
+-#if !GTK_CHECK_VERSION(3,0,0)
+     if (nWidth > nOrigwidth || nHeight > nOrigheight)
+     {
+         m_bPaintsBlocked = true;
+     }
+-#endif
+     gtk_widget_set_size_request(m_pWindow, nWidth, nHeight );
++#else
++    gtk_widget_set_size_request(GTK_WIDGET(m_pFixedContainer), nWidth, nHeight );
++#endif
+ }
+ 
+ void GtkSalFrame::window_resize(long nWidth, long nHeight)
+ {
++#if !GTK_CHECK_VERSION(3,0,0)
+     gint nOrigwidth, nOrigheight;
+     gtk_window_get_size(GTK_WINDOW(m_pWindow), &nOrigwidth, &nOrigheight);
+-#if !GTK_CHECK_VERSION(3,0,0)
+     if (nWidth > nOrigwidth || nHeight > nOrigheight)
+     {
+         m_bPaintsBlocked = true;
+@@ -1080,7 +1082,7 @@ void GtkSalFrame::InitCommon()
+     m_aMouseSignalIds.push_back(g_signal_connect( G_OBJECT(pEventWidget), "button-release-event", G_CALLBACK(signalButton), this ));
+ #if GTK_CHECK_VERSION(3,0,0)
+     g_signal_connect( G_OBJECT(m_pFixedContainer), "draw", G_CALLBACK(signalDraw), this );
+-    g_signal_connect( G_OBJECT(m_pWindow), "size-allocate", G_CALLBACK(sizeAllocated), this );
++    g_signal_connect( G_OBJECT(m_pFixedContainer), "size-allocate", G_CALLBACK(sizeAllocated), this );
+ #if GTK_CHECK_VERSION(3,14,0)
+     GtkGesture *pSwipe = gtk_gesture_swipe_new(pEventWidget);
+     g_signal_connect(pSwipe, "swipe", G_CALLBACK(gestureSwipe), this);
+-- 
+2.5.0
+
diff --git a/libreoffice.spec b/libreoffice.spec
index 0fa4ff3..bbdbbdd 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -317,6 +317,7 @@ Patch15: 0001-add-X-TryExec-entries-to-desktop-files.patch
 Patch16: 0001-disable-PSD-import-test-which-deadlocks-on-ARM.patch
 # backport from master
 Patch17: 0001-Resolves-rhbz-1285380-get-menus-working-under-waylan.patch
+Patch18: 0001-gtk3-wayland-wrong-dialog-sizes.patch
 
 %define instdir %{_libdir}
 %define baseinstdir %{instdir}/libreoffice