diff --git a/mozilla/gfx/public/Makefile.in b/mozilla/gfx/public/Makefile.in
index 0b8e1495d43..22a4ac80c83 100644
--- a/mozilla/gfx/public/Makefile.in
+++ b/mozilla/gfx/public/Makefile.in
@@ -58,6 +58,10 @@ EXPORTS		= \
 		nsIDrawingSurface.h \
 		$(NULL)
 
+ifeq ($(MOZ_WIDGET_TOOLKIT),mac)
+EXPORTS		+= nsIPrintingContext.h
+endif
+
 EXPORTS		:= $(addprefix $(srcdir)/, $(EXPORTS))
 
 include $(topsrcdir)/config/rules.mk