diff --git a/src/mesa/sources b/src/mesa/sources
index b35e56abad8..55c282cad90 100644
--- a/src/mesa/sources
+++ b/src/mesa/sources
@@ -167,6 +167,7 @@ SHADER_SOURCES = \
 	shader/shader_api.c \
 
 SLANG_SOURCES =	\
+	shader/slang/slang_builtin.c	\
 	shader/slang/slang_codegen.c	\
 	shader/slang/slang_compile.c	\
 	shader/slang/slang_compile_function.c	\