diff --git a/third_party/Android.mk b/third_party/Android.mk
index 4c9af5ce6..e98d04a9e 100644
--- a/third_party/Android.mk
+++ b/third_party/Android.mk
@@ -5,7 +5,7 @@ LOCAL_PATH := $(GLSLANG_LOCAL_PATH)
 
 GLSLANG_OS_FLAGS := -DGLSLANG_OSINCLUDE_UNIX
 # AMD and NV extensions are turned on by default in upstream Glslang.
-GLSLANG_DEFINES:= -DAMD_EXTENSIONS -DNV_EXTENSIONS $(GLSLANG_OS_FLAGS)
+GLSLANG_DEFINES:= -DAMD_EXTENSIONS -DNV_EXTENSIONS -DENABLE_HLSL $(GLSLANG_OS_FLAGS)
 
 include $(CLEAR_VARS)
 LOCAL_MODULE:=SPIRV