diff --git a/support/scripts/apply-patches.sh b/support/scripts/apply-patches.sh
index 2d39d63..9fb488c 100755
--- a/support/scripts/apply-patches.sh
+++ b/support/scripts/apply-patches.sh
@@ -113,8 +113,8 @@
         echo "  to be applied  : ${path}/${patch}"
         exit 1
     fi
-    if grep -q "^rename from" ${path}/${patch} && \
-       grep -q "^rename to" ${path}/${patch} ; then
+    if ${uncomp} "${path}/$patch" | grep -q "^rename from" && \
+       ${uncomp} "${path}/$patch" | grep -q "^rename to" ; then
         echo "Error: patch contains some renames, not supported by old patch versions"
         exit 1
     fi