diff --git a/src/r_data/colormaps.cpp b/src/r_data/colormaps.cpp
index c3004a4daf..b7e1b904b3 100644
--- a/src/r_data/colormaps.cpp
+++ b/src/r_data/colormaps.cpp
@@ -396,7 +396,7 @@ void R_SetDefaultColormap (const char *name)
 		BYTE unremap[256];
 		BYTE remap[256];
 
-		lump = Wads.CheckNumForName (name, ns_colormaps);
+		lump = Wads.CheckNumForFullName (name, true, ns_colormaps);
 		if (lump == -1)
 			lump = Wads.CheckNumForName (name, ns_global);