diff --git a/include/mksh/misc.h b/include/mksh/misc.h
index f3504bb..30eb2c6 100644
--- a/include/mksh/misc.h
+++ b/include/mksh/misc.h
@@ -51,5 +51,6 @@ extern void	warning_mksh(char * message, ...);
 extern void	append_string(register char *from, register String to, register int length);
 extern wchar_t	*get_wstring(char * from);
 
+#define bsd_signal(x, y) signal(x, y)
 
 #endif