diff --git a/mobile/locales/Makefile.in b/mobile/locales/Makefile.in
index cb3d835dd3d2..9b090be955c8 100644
--- a/mobile/locales/Makefile.in
+++ b/mobile/locales/Makefile.in
@@ -163,10 +163,18 @@ endif
 # When we unpack fennec on MacOS X the platform.ini and application.ini are in slightly
 # different locations that on all other platforms
 ifeq (Darwin, $(OS_ARCH))
+ifdef LIBXUL_SDK
 GECKO_PLATFORM_INI_PATH="$(STAGEDIST)/../Frameworks/XUL.framework/Versions/$(MOZILLA_VERSION)/platform.ini"
+else
+GECKO_PLATFORM_INI_PATH="$(STAGEDIST)/../Resources/platform.ini"
+endif
 FENNEC_APPLICATION_INI_PATH="$(STAGEDIST)/../Resources/application.ini"
 else
+ifdef LIBXUL_SDK
+GECKO_PLATFORM_INI_PATH="$(STAGEDIST)/xulrunner/platform.ini"
+else
 GECKO_PLATFORM_INI_PATH="$(STAGEDIST)/platform.ini"
+endif
 FENNEC_APPLICATION_INI_PATH="$(STAGEDIST)/application.ini"
 endif