diff --git a/libsrc/common/_scanf.c b/libsrc/common/_scanf.c
index 8526b8933..34728f8dd 100644
--- a/libsrc/common/_scanf.c
+++ b/libsrc/common/_scanf.c
@@ -29,8 +29,6 @@
 
 #include "_scanf.h"
 
-extern void __fastcall__ _seterrno (unsigned char code);
-
 #pragma static-locals(on)