diff --git a/src/siirtc.c b/src/siirtc.c
index 5f4fc0a23..0e598f717 100644
--- a/src/siirtc.c
+++ b/src/siirtc.c
@@ -4,6 +4,7 @@
 
 #include "gba/gba.h"
 #include "siirtc.h"
+#include "config.h"
 
 #define STATUS_INTFE  0x02 // frequency interrupt enable
 #define STATUS_INTME  0x08 // per-minute interrupt enable