diff --git a/core/m68k/m68kcpu.h b/core/m68k/m68kcpu.h
index 81557c2..c1b67a0 100644
--- a/core/m68k/m68kcpu.h
+++ b/core/m68k/m68kcpu.h
@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <limits.h>
 #include <stdint.h>
+#include <sys/types.h>
 
 #if M68K_EMULATE_ADDRESS_ERROR
 #include <setjmp.h>