diff --git a/kdelibs.spec b/kdelibs.spec
index 021b7bd..8418f60 100644
--- a/kdelibs.spec
+++ b/kdelibs.spec
@@ -212,6 +212,7 @@ if [ "%{_lib}" == "lib64" ] ; then
 fi
 
 %configure \
+   --disable-fast-malloc \
    --enable-new-ldflags \
    --disable-dependency-tracking \
    --with-qt-libraries=$QTLIB \