diff --git a/engine/server/sv_send.c b/engine/server/sv_send.c
index a97de6f24..caa7d064e 100644
--- a/engine/server/sv_send.c
+++ b/engine/server/sv_send.c
@@ -192,7 +192,7 @@ Con_DPrintf
 A Con_Printf that only shows up if the "developer" cvar is set
 ================
 */
-void Con_DPrintf (char *fmt, ...)
+void Con_DPrintf (const char *fmt, ...)
 {
 	va_list		argptr;
 	char		msg[MAXPRINTMSG];