diff --git a/qwt.spec b/qwt.spec
index c6bc152..d329553 100644
--- a/qwt.spec
+++ b/qwt.spec
@@ -23,7 +23,7 @@ Source:  http://downloads.sourceforge.net/%{name}/%{name}-%{version}.tar.bz2
 # fix pkgconfig support
 Patch50: qwt-6.1.1-pkgconfig.patch
 # use QT_INSTALL_ paths instead of custom prefix
-Patch51: qwt-6.1.2-qt_install_paths.patch
+Patch51: qwt-6.1.5-qt_install_paths.patch
 # parallel-installable qt5 version
 Patch52: qwt-qt5.patch
 #