diff --git a/MagickCore/cache-private.h b/MagickCore/cache-private.h
index f7ff139..cf3b772 100644
--- a/MagickCore/cache-private.h
+++ b/MagickCore/cache-private.h
@@ -188,8 +188,8 @@
     file;
 
   char
-    filename[MaxTextExtent],
-    cache_filename[MaxTextExtent];
+    filename[MagickPathExtent],
+    cache_filename[MagickPathExtent];
 
   CacheMethods
     methods;