diff --git a/src/include/86box/fdc_ext.h b/src/include/86box/fdc_ext.h
index 188881f77..4b33ed7a1 100644
--- a/src/include/86box/fdc_ext.h
+++ b/src/include/86box/fdc_ext.h
@@ -44,4 +44,4 @@ extern const device_t *fdc_card_getdevice(int card);
 extern int             fdc_card_has_config(int card);
 extern int             fdc_card_available(int card);
 
-#endif /*EMU_FDC_H*/
+#endif /*EMU_FDC_EXT_H*/