diff --git a/Makefile b/Makefile
index 1bab521c599..9901250f875 100644
--- a/Makefile
+++ b/Makefile
@@ -232,6 +232,7 @@ MAIN_FILES = \
 	$(DIRECTORY)/src/glsl/README					\
 	$(DIRECTORY)/src/glsl/glcpp/*.[chly]				\
 	$(DIRECTORY)/src/glsl/glcpp/README				\
+	$(DIRECTORY)/src/glsl/builtins					\
 	$(DIRECTORY)/src/Makefile					\
 	$(DIRECTORY)/src/mesa/Makefile*					\
 	$(DIRECTORY)/src/mesa/sources.mak				\