diff --git a/src/doom/d_main.c b/src/doom/d_main.c
index 79a5304b..6ee5a7dd 100644
--- a/src/doom/d_main.c
+++ b/src/doom/d_main.c
@@ -900,7 +900,7 @@ static boolean D_AddFile(char *filename)
 // Some dehacked mods replace these.  These are only displayed if they are 
 // replaced by dehacked.
 
-static char *copyright_banners[] =
+static const char *copyright_banners[] =
 {
     "===========================================================================\n"
     "ATTENTION:  This version of DOOM has been modified.  If you would like to\n"