diff --git a/src/tink/macro/Types.hx b/src/tink/macro/Types.hx
index 58e2aa7..9e89335 100644
--- a/src/tink/macro/Types.hx
+++ b/src/tink/macro/Types.hx
@@ -209,9 +209,9 @@ class Types {
       }
   
   static public function deduceCommonType(types:Array<Type>):Outcome<Type, Error> {
-    var exprs = types.map(t ->{
+    var exprs = types.map(function(t) {
       var ct = t.toComplex();
-      macro (null:$ct);
+      return macro (null:$ct);
     });
     
     return switch (macro $a{exprs}).typeof() {
diff --git a/tests/Types.hx b/tests/Types.hx
index c344f04..9a602bf 100644
--- a/tests/Types.hx
+++ b/tests/Types.hx
@@ -67,10 +67,11 @@ class Types extends Base {
   }
   
   function testDeduceCommonType() {
-    assertEquals('StdTypes.Float', tink.macro.Types.deduceCommonType([(macro:Float), (macro:Int)].map(ct -> ct.toType().sure())).sure().toComplex().toString());
-    assertEquals('Types.CommonI1', tink.macro.Types.deduceCommonType([(macro:Types.CommonA), (macro:Types.CommonB), (macro:Types.CommonC)].map(ct -> ct.toType().sure())).sure().toComplex().toString());
-    assertEquals('Types.CommonI2', tink.macro.Types.deduceCommonType([(macro:Types.CommonB), (macro:Types.CommonC)].map(ct -> ct.toType().sure())).sure().toComplex().toString());
-    // assertEquals('Types.CommonI3', tink.macro.Types.deduceCommonType([(macro:Types.CommonC)].map(ct -> ct.toType().sure())).sure().toComplex().toString());
+    function ct2t(ct:ComplexType) return ct.toType().sure();
+    assertEquals('StdTypes.Float', tink.macro.Types.deduceCommonType([(macro:Float), (macro:Int)].map(ct2t)).sure().toComplex().toString());
+    assertEquals('Types.CommonI1', tink.macro.Types.deduceCommonType([(macro:Types.CommonA), (macro:Types.CommonB), (macro:Types.CommonC)].map(ct2t)).sure().toComplex().toString());
+    assertEquals('Types.CommonI2', tink.macro.Types.deduceCommonType([(macro:Types.CommonB), (macro:Types.CommonC)].map(ct2t)).sure().toComplex().toString());
+    // assertEquals('Types.CommonI3', tink.macro.Types.deduceCommonType([(macro:Types.CommonC)].map(ct2t)).sure().toComplex().toString());
   }
 }
 #end