diff --git a/wand/compare.c b/wand/compare.c
index 623f766..b33fcd3 100644
--- a/wand/compare.c
+++ b/wand/compare.c
@@ -229,6 +229,7 @@
   MagickBooleanType
     fire,
     pend,
+    respect_parenthesis,
     subimage_search;
 
   MagickStatusType
@@ -283,6 +284,7 @@
   option=(char *) NULL;
   pend=MagickFalse;
   reconstruct_image=NewImageList();
+  respect_parenthesis=MagickFalse;
   status=MagickTrue;
   subimage_search=MagickFalse;
   /*