diff --git a/src/macros.rs b/src/macros.rs
index e59be59..5b32686 100644
--- a/src/macros.rs
+++ b/src/macros.rs
@@ -9,7 +9,7 @@ macro_rules! external_library
          )|*
 
          $(functions:
-            $($fname: ident($($farg: ident: $fargt: ty),*) -> $fret:ty),+;
+            $($fname: ident($($farg: ident : $fargt: ty),*) -> $fret:ty),+;
          )|*
 
          $(varargs:
@@ -23,7 +23,7 @@ macro_rules! external_library
       {
          $($(pub static $sname: $stype;)+)*
 
-         $($(pub fn $fname($(_: $farg),*) -> $fret;)+)*
+         $($(pub fn $fname($($farg: $fargt),*) -> $fret;)+)*
 
          $($(pub fn $vname($(_: $vargs),+ , ...) -> $vret;)+)*
       }