diff --git a/desktop/wmsm.app/wmsm.app.SlackBuild b/desktop/wmsm.app/wmsm.app.SlackBuild
index f11e4996e2..9c4f7eb1f1 100644
--- a/desktop/wmsm.app/wmsm.app.SlackBuild
+++ b/desktop/wmsm.app/wmsm.app.SlackBuild
@@ -54,7 +54,7 @@ find -L . \
 
 cd wmsm
   make \
-    CFLAGS="$SLKCFLAGS -fgnu89-inline" \
+    CFLAGS="$SLKCFLAGS -fgnu89-inline -fcommon" \
     INCDIR="-I/usr/include/X11" \
     LIBDIR="-L/usr/lib${LIBDIRSUFFIX}/X11"
   # Executable is copied to the correct location