diff --git a/extensions/transformiix/macbuild/transformiixPrefix.h b/extensions/transformiix/macbuild/transformiixPrefix.h
index 0c02937f525d..0b68e738331c 100755
--- a/extensions/transformiix/macbuild/transformiixPrefix.h
+++ b/extensions/transformiix/macbuild/transformiixPrefix.h
@@ -24,6 +24,4 @@
  *
  */
 
-#define MOZ_XSL
-
 #include "MacSharedPrefix.h"
diff --git a/extensions/transformiix/macbuild/transformiixPrefix_debug.h b/extensions/transformiix/macbuild/transformiixPrefix_debug.h
index 94643bcc633d..088f325b1e8a 100755
--- a/extensions/transformiix/macbuild/transformiixPrefix_debug.h
+++ b/extensions/transformiix/macbuild/transformiixPrefix_debug.h
@@ -24,6 +24,4 @@
  *
  */
 
-#define MOZ_XSL
-
 #include "MacSharedPrefix_debug.h"