diff --git a/sys/pc98/pc98/pc98_machdep.c b/sys/pc98/pc98/pc98_machdep.c
index 33b2d27db2b9..e0571f75e09a 100644
--- a/sys/pc98/pc98/pc98_machdep.c
+++ b/sys/pc98/pc98/pc98_machdep.c
@@ -38,7 +38,9 @@
 
 #include <cam/cam.h>
 #include <cam/cam_ccb.h>
-
+#ifdef EPSON_MEMWIN
+#include <pc98/pc98/pc98.h>
+#endif
 #include <pc98/pc98/pc98_machdep.h>
 
 /*