diff --git a/coders/dps.c b/coders/dps.c
index 9ddfa21..3206d68 100644
--- a/coders/dps.c
+++ b/coders/dps.c
@@ -155,12 +155,12 @@
Open X server connection.
*/
assert(image_info != (const ImageInfo *) NULL);
- assert(image_info->signature == MagickSignature);
+ assert(image_info->signature == MagickCoreSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
- assert(exception->signature == MagickSignature);
+ assert(exception->signature == MagickCoreSignature);
display=XOpenDisplay(image_info->server_name);
if (display == (Display *) NULL)
return((Image *) NULL);