diff --git a/proto.h b/proto.h
index 39c07f507e21fae4005dcef92ed637d3c4734f7a..239bb8ea6d76f7991d5671bc936e7d881632c2f0 100644
--- a/proto.h
+++ b/proto.h
@@ -227,7 +227,7 @@ int open_prevfile_void(void), open_nextfile_void(void);
 char *charalloc (size_t howmuch);
 char *get_next_filename(char *name);
 
-#if defined (ENABLE_MULTIBUFFER) || !defined (DISABLE_SPELLER) || !defined (DISABLE_OPERATINGDIR)
+#if !defined (DISABLE_SPELLER) || !defined (DISABLE_OPERATINGDIR)
 char *get_full_path(const char *origpath);
 #endif