diff --git a/gfx/src/mac/nsDeviceContextMac.cpp b/gfx/src/mac/nsDeviceContextMac.cpp
index 6f91248fe350..ebb70fbdb1f3 100644
--- a/gfx/src/mac/nsDeviceContextMac.cpp
+++ b/gfx/src/mac/nsDeviceContextMac.cpp
@@ -25,6 +25,7 @@
 #include <TextCommon.h>
 #include <StringCompare.h>
 #include <Fonts.h>
+#include <Resources.h>
 #include "il_util.h"
 #include <FixMath.h>
 
diff --git a/widget/src/mac/nsDeviceContextMac.cpp b/widget/src/mac/nsDeviceContextMac.cpp
index 6f91248fe350..ebb70fbdb1f3 100644
--- a/widget/src/mac/nsDeviceContextMac.cpp
+++ b/widget/src/mac/nsDeviceContextMac.cpp
@@ -25,6 +25,7 @@
 #include <TextCommon.h>
 #include <StringCompare.h>
 #include <Fonts.h>
+#include <Resources.h>
 #include "il_util.h"
 #include <FixMath.h>