diff --git a/engine.build.lua b/engine.build.lua
index 3493812..7c052de 100644
--- a/engine.build.lua
+++ b/engine.build.lua
@@ -140,7 +140,8 @@ local gfxdrv_module = Module("source/GfxDriver", {
 })
 
 local gfxdrv_opengl_module = Module("source/GfxDriver/OpenGL", {
-    "OpenGLDrv.cpp"
+    "OpenGLDrv.cpp",
+	"OpenGLShaderProgram.cpp"
 })
 
 local core_module = Module("source/Core", {