diff --git a/src/proto.h b/src/proto.h
index 5cf9f045b771fafab88ababf72406d7fb95974cf..84e99d4ecb3593ef8d35c36d26c8ee2234507083 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -156,8 +156,8 @@ bool is_alnum_char(int c);
 bool is_alnum_mbchar(const char *c);
 #ifdef NANO_WIDE
 bool is_alnum_wchar(wchar_t wc);
-#endif
 bool is_ascii_char(int c);
+#endif
 bool is_blank_char(int c);
 bool is_blank_mbchar(const char *c);
 #ifdef NANO_WIDE