diff --git a/hw/xbox/nv2a/pgraph/glsl/vsh-ff.c b/hw/xbox/nv2a/pgraph/glsl/vsh-ff.c
index 445ce73066..19ebf12f3b 100644
--- a/hw/xbox/nv2a/pgraph/glsl/vsh-ff.c
+++ b/hw/xbox/nv2a/pgraph/glsl/vsh-ff.c
@@ -414,7 +414,7 @@ GLSL_DEFINE(materialEmissionColor, GLSL_LTCTXA(NV_IGRAPH_XF_LTCTXA_CM_COL) ".xyz
             mstring_append(body, "  float fogDistance = fogCoord;\n");
             break;
         default:
-            assert(false);
+            assert(!"Invalid foggen mode");
             break;
         }
 
diff --git a/hw/xbox/nv2a/pgraph/vsh.h b/hw/xbox/nv2a/pgraph/vsh.h
index 405b6c9aa6..36cac16edf 100644
--- a/hw/xbox/nv2a/pgraph/vsh.h
+++ b/hw/xbox/nv2a/pgraph/vsh.h
@@ -55,8 +55,6 @@ enum VshFoggen {
     FOGGEN_RADIAL,
     FOGGEN_PLANAR,
     FOGGEN_ABS_PLANAR,
-    FOGGEN_ERROR4,
-    FOGGEN_ERROR5,
     FOGGEN_FOG_X
 };