diff --git a/tools/kernel/patch.sh b/tools/kernel/patch.sh
index 62a4b25f784bf28c4542e317f95c04e04feaea63..41d21e870b8f8beabda7318cc684a16001080644 100755
--- a/tools/kernel/patch.sh
+++ b/tools/kernel/patch.sh
@@ -49,5 +49,7 @@ do
         fi
     done
 
-    [ -x "$d/patch.sh" ] && $d/patch.sh $KERNEL_SRC
+    if [ -x "$d/patch.sh" ]; then
+        $d/patch.sh $KERNEL_SRC
+    fi
 done