diff --git a/tools/build/buildshorewall b/tools/build/buildshorewall
index 64b81509f..95ef85709 100755
--- a/tools/build/buildshorewall
+++ b/tools/build/buildshorewall
@@ -776,7 +776,7 @@ done
 if [ -n "$OLDVERSION" ]; then
     progress_message "Creating patch-$VERSION ..."
 
-    diff -Naur shorewall-$OLDVERSION shorewall-$VERSION > patch-$VERSION || true
+    diff -Naur shorewall-common-$OLDVERSION shorewall-common-$VERSION > patch-$VERSION || true
     diff -Naur -X $(dirname $0)/exclude.txt shorewall-lite-$OLDVERSION shorewall-lite-$VERSION >> patch-$VERSION || true
     diff -Naur -X $(dirname $0)/exclude.txt shorewall-perl-$OLDVERSION shorewall-perl-$VERSION >> patch-$VERSION || true
     diff -Naur -X $(dirname $0)/exclude.txt shorewall-shell-$OLDVERSION shorewall-shell-$VERSION >> patch-$VERSION || true