diff --git a/src/doom/hu_stuff.c b/src/doom/hu_stuff.c
index d1c5bdc8..3f6c50e9 100644
--- a/src/doom/hu_stuff.c
+++ b/src/doom/hu_stuff.c
@@ -110,7 +110,7 @@ static boolean		headsupactive = false;
 // The actual names can be found in DStrings.h.
 //
 
-char*	mapnames[] =	// DOOM shareware/registered/retail (Ultimate) names.
+const char *mapnames[] =	// DOOM shareware/registered/retail (Ultimate) names.
 {
 
     HUSTR_E1M1,