diff --git a/src/fn_register.rs b/src/fn_register.rs
index 4b98f184..f33c5855 100644
--- a/src/fn_register.rs
+++ b/src/fn_register.rs
@@ -190,12 +190,6 @@ impl<PL: Plugin> RegisterPlugin<PL> for Engine {
     }
 }
 
-/// This macro counts the number of arguments via recursion.
-macro_rules! count_args {
-    () => { 0_usize };
-    ( $head:ident $($tail:ident)* ) => { 1_usize + count_args!($($tail)*) };
-}
-
 /// This macro creates a closure wrapping a registered function.
 macro_rules! make_func {
 	($fn:ident : $map:expr ; $($par:ident => $convert:expr),*) => {