diff --git a/src/r_data/gldefs.cpp b/src/r_data/gldefs.cpp
index 8552ad77d..84ace2798 100644
--- a/src/r_data/gldefs.cpp
+++ b/src/r_data/gldefs.cpp
@@ -871,6 +871,7 @@ class GLDefsParser
 			sc.ScriptError("Name longer than 8 characters: %s\n", sc.String);
 		}
 		frameName = sc.String;
+		frameName.ToUpper();
 
 		startDepth = ScriptDepth;