diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index da8965454ae30f52e1c50762e0dff76f875d6780..e426bcdddf56d36c3796c101d4b3a628b964ed5b 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -5794,6 +5794,7 @@ void HWR_AddCommands(void)
 	CV_RegisterVar(&cv_glskydome);
 	CV_RegisterVar(&cv_glspritebillboarding);
 	CV_RegisterVar(&cv_glfakecontrast);
+	CV_RegisterVar(&cv_glslopecontrast);
 	CV_RegisterVar(&cv_glshearing);
 	CV_RegisterVar(&cv_glshaders);