diff --git a/radiant/qe3.cpp b/radiant/qe3.cpp
index 418e9b33..49042668 100644
--- a/radiant/qe3.cpp
+++ b/radiant/qe3.cpp
@@ -1142,7 +1142,7 @@ ParseNum / ParseHex
 */
 int ParseHex (const char *hex)
 {
-	char    *str;
+	const char    *str;
 	int    num;
 
 	num = 0;