diff --git a/sys/i386/isa/sound/local.h b/sys/i386/isa/sound/local.h
index 2d81c528d37..cf8a2193f60 100644
--- a/sys/i386/isa/sound/local.h
+++ b/sys/i386/isa/sound/local.h
@@ -101,10 +101,12 @@
 #define CONFIG_YM3812
 #endif
 
+#ifdef PC98
 #include "nss.h"
 #if NNSS != 0
 #define CONFIG_NSS
 #endif
+#endif
 
 #define ALLOW_POLL