diff --git a/src/Language/Python/Syntax.hs b/src/Language/Python/Syntax.hs
index 938a542b7..02ec6fdbb 100644
--- a/src/Language/Python/Syntax.hs
+++ b/src/Language/Python/Syntax.hs
@@ -239,9 +239,10 @@ exceptClause = makeTerm <$> symbol ExceptClause <*> children
                    <*> expressions)
 
 functionDefinition :: Assignment
-functionDefinition =  makeFunctionDeclaration <$> symbol FunctionDefinition <*> children ((,,,) <$> expression <*> (symbol Parameters *> children (many expression)) <*> optional (symbol Type *> children expression) <*> expressions)
-                  <|> makeAsyncFunctionDeclaration <$> symbol AsyncFunctionDefinition <*> children ((,,,,) <$> async' <*> expression <*> (symbol Parameters *> children (many expression)) <*> optional (symbol Type *> children expression) <*> expressions)
-                  <|> makeFunctionDeclaration <$> symbol Lambda <*> children ((,,,) <$> (makeTerm <$> symbol AnonLambda <*> (Syntax.Identifier <$> source)) <*> ((symbol LambdaParameters *> children (many expression)) <|> pure []) <*> optional (symbol Type *> children expression) <*> expressions)
+functionDefinition
+  =   makeFunctionDeclaration <$> symbol FunctionDefinition <*> children ((,,,) <$> expression <* symbol Parameters <*> children (many expression) <*> optional (symbol Type *> children expression) <*> expressions)
+  <|> makeAsyncFunctionDeclaration <$> symbol AsyncFunctionDefinition <*> children ((,,,,) <$> async' <*> expression <* symbol Parameters <*> children (many expression) <*> optional (symbol Type *> children expression) <*> expressions)
+  <|> makeFunctionDeclaration <$> symbol Lambda <*> children ((,,,) <$> (makeTerm <$> symbol AnonLambda <*> (Syntax.Identifier <$> source)) <*> (symbol LambdaParameters *> children (many expression) <|> pure []) <*> optional (symbol Type *> children expression) <*> expressions)
   where
     makeFunctionDeclaration loc (functionName', functionParameters, ty, functionBody) = makeTerm loc $ Type.Annotation (makeTerm loc $ Declaration.Function functionName' functionParameters functionBody) (maybe (makeTerm loc Syntax.Empty) id ty)
     makeAsyncFunctionDeclaration loc (async', functionName', functionParameters, ty, functionBody) = makeTerm loc $ Type.Annotation (makeTerm loc $ Type.Annotation (makeTerm loc $ Declaration.Function functionName' functionParameters functionBody) (maybe (makeTerm loc Syntax.Empty) id ty)) async'