1 files changed, 0 insertions, 3 deletions
diff --git a/ruby.c b/ruby.c
index 3e018f63d3..632d87ef55 100644
--- a/ruby.c
+++ b/ruby.c
@@ -49,9 +49,6 @@ static int xflag = 0;
 extern int yydebug;
 
 char *ruby_inplace_mode = Qfalse;
-# ifndef strdup
-char *strdup();
-# endif
 
 static void load_stdin _((void));
 static void load_file _((char *, int));