diff --git a/desmume/src/ctrlssdl.cpp b/desmume/src/ctrlssdl.cpp
index 8851b4fa4..fc111e98b 100644
--- a/desmume/src/ctrlssdl.cpp
+++ b/desmume/src/ctrlssdl.cpp
@@ -22,6 +22,11 @@
 
 #include "ctrlssdl.h"
 
+const char *key_names[NB_KEYS];
+u16 keyboard_cfg[NB_KEYS];
+u16 joypad_cfg[NB_KEYS];
+u16 nbr_joy;
+
 static SDL_Joystick **open_joysticks = NULL;
 
 /* Keypad key names */