diff --git a/MagickCore/static.c b/MagickCore/static.c
index b0242d5..a91fc84 100644
--- a/MagickCore/static.c
+++ b/MagickCore/static.c
@@ -89,7 +89,7 @@
     rights;
 
   assert(image != (Image **) NULL);
-  assert((*image)->signature == MagickSignature);
+  assert((*image)->signature == MagickCoreSignature);
   if ((*image)->debug != MagickFalse)
     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",(*image)->filename);
   rights=ReadPolicyRights;