1 files changed, 6 insertions, 2 deletions
diff --git a/gfx/src/moz.build b/gfx/src/moz.build
index 993d4bde2c..2029a10a10 100644
--- a/gfx/src/moz.build
+++ b/gfx/src/moz.build
@@ -55,12 +55,11 @@ if CONFIG['MOZ_X11']:
         'X11Util.cpp',
     ]
 
-SOURCES += [
+UNIFIED_SOURCES += [
     'DriverCrashGuard.cpp',
     'FilterSupport.cpp',
     'gfxTelemetry.cpp',
     'nsColor.cpp',
-    'nsDeviceContext.cpp',
     'nsFont.cpp',
     'nsFontMetrics.cpp',
     'nsRect.cpp',
@@ -72,6 +71,11 @@ SOURCES += [
     'TiledRegion.cpp',
 ]
 
+# nsDeviceContext.cpp cannot be built in unified mode because it pulls in OS X system headers.
+SOURCES += [
+    'nsDeviceContext.cpp',
+]
+
 include('/ipc/chromium/chromium-config.mozbuild')
 
 LOCAL_INCLUDES += [