diff --git a/src/hardware/mame/emu.h b/src/hardware/mame/emu.h
index 6f154995..85a9dd86 100644
--- a/src/hardware/mame/emu.h
+++ b/src/hardware/mame/emu.h
@@ -13,6 +13,11 @@
 #include <stdlib.h>
 #include <memory.h>
 
+#if C_DEBUG
+#include <stdio.h>
+#include <stdarg.h>
+#endif
+
 #ifndef M_PI
 #define M_PI           3.14159265358979323846
 #endif