diff --git a/src/d_netcmd.c b/src/d_netcmd.c
index 38004d5ff9..aadebab804 100644
--- a/src/d_netcmd.c
+++ b/src/d_netcmd.c
@@ -46,6 +46,7 @@
 #include "lua_hook.h"
 #include "m_cond.h"
 #include "m_anigif.h"
+#include "md5.h"
 
 #ifdef NETGAME_DEVMODE
 #define CV_RESTRICT CV_NETVAR