diff --git a/mingw-glibmm24.spec b/mingw-glibmm24.spec
index b1bfc26..9fb31d0 100644
--- a/mingw-glibmm24.spec
+++ b/mingw-glibmm24.spec
@@ -76,7 +76,6 @@ Static cross compiled version of the glibmm library.
 
 %prep
 %setup -q -n glibmm-%{version}
-%patch0 -p1 -b .mutex
 
 %build
 %mingw_configure --enable-static