diff --git a/gfx/cairo/libpixman/src/moz.build b/gfx/cairo/libpixman/src/moz.build
index e9e43a12bb00..3ffeddf661b3 100644
--- a/gfx/cairo/libpixman/src/moz.build
+++ b/gfx/cairo/libpixman/src/moz.build
@@ -73,9 +73,6 @@ LOCAL_INCLUDES += [
 if CONFIG['MOZ_USE_PTHREADS']:
     DEFINES['HAVE_PTHREAD_SETSPECIFIC'] = True
 
-if CONFIG['_MSC_VER']:
-    DEFINES['PIXMAN_USE_XP_DLL_TLS_WORKAROUND'] = True
-
 DEFINES['PACKAGE'] = 'mozpixman'
 
 DEFINES['_USE_MATH_DEFINES'] = True