diff --git a/MagickCore/method-attribute.h b/MagickCore/method-attribute.h
index 0a3f9b20fc..b5722f53cb 100644
--- a/MagickCore/method-attribute.h
+++ b/MagickCore/method-attribute.h
@@ -103,7 +103,7 @@ extern "C" {
 
 #define MagickSignature  0xabacadabUL
 #if !defined(MaxTextExtent)
-# define MaxTextExtent  131072  /* always >= 4096 */
+# define MaxTextExtent  (16*8192-2)  /* always >= 4096 */
 #endif
 
 #if defined(MAGICKCORE_HAVE___ATTRIBUTE__)
diff --git a/MagickWand/method-attribute.h b/MagickWand/method-attribute.h
index d6b27476f3..c87fd24bcb 100644
--- a/MagickWand/method-attribute.h
+++ b/MagickWand/method-attribute.h
@@ -96,7 +96,7 @@ extern "C" {
 
 #define WandSignature  0xabacadabUL
 #if !defined(MaxTextExtent)
-# define MaxTextExtent  131072
+# define MaxTextExtent  (16*8192-2)
 #endif
 
 #if defined(MAGICKCORE_HAVE___ATTRIBUTE__)