diff --git a/Quake/quakedef.h b/Quake/quakedef.h
index a2330c80..a0d76a5e 100644
--- a/Quake/quakedef.h
+++ b/Quake/quakedef.h
@@ -203,15 +203,15 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 typedef struct
 {
-	char	*basedir;
-	char	*userdir;	// user's directory on UNIX platforms.
+	const char *basedir;
+	const char *userdir;	// user's directory on UNIX platforms.
 				// if user directories are enabled, basedir
 				// and userdir will point to different
 				// memory locations, otherwise to the same.
-	int		argc;
+	int	argc;
 	char	**argv;
 	void	*membase;
-	int		memsize;
+	int	memsize;
 } quakeparms_t;
 
 #include "common.h"