diff --git a/hw/xbox/nv2a/pgraph.c b/hw/xbox/nv2a/pgraph.c
index 4e90170fb8..7f3d7a6988 100644
--- a/hw/xbox/nv2a/pgraph.c
+++ b/hw/xbox/nv2a/pgraph.c
@@ -80,7 +80,7 @@ static const GLenum pgraph_texture_addr_map[] = {
     GL_MIRRORED_REPEAT,
     GL_CLAMP_TO_EDGE,
     GL_CLAMP_TO_BORDER,
-    // GL_CLAMP
+    GL_CLAMP_TO_EDGE, /* Approximate GL_CLAMP */
 };
 
 static const GLenum pgraph_blend_factor_map[] = {