diff --git a/reactos/dll/opengl/mesa/src/mesa/swrast/CMakeLists.txt b/reactos/dll/opengl/mesa/src/mesa/swrast/CMakeLists.txt
index b6ad3de7982..7c9692dc9bc 100644
--- a/reactos/dll/opengl/mesa/src/mesa/swrast/CMakeLists.txt
+++ b/reactos/dll/opengl/mesa/src/mesa/swrast/CMakeLists.txt
@@ -3,7 +3,7 @@ list(APPEND SOURCE
     s_aaline.c
     s_aatriangle.c
     s_alpha.c
-    s_atifragshader.C
+    s_atifragshader.c
     s_bitmap.c
     s_blend.c
     s_blit.c