diff --git a/compiler/semtypes.nim b/compiler/semtypes.nim
index 953801431..d85008342 100644
--- a/compiler/semtypes.nim
+++ b/compiler/semtypes.nim
@@ -1286,6 +1286,7 @@ proc semProcTypeNode(c: PContext, n, genericParams: PNode,
       addParamOrResult(c, arg, kind)
       styleCheckDef(c.config, a[j].info, arg)
       onDef(a[j].info, arg)
+      a[j] = newSymNode(arg)
 
   var r: PType
   if n[0].kind != nkEmpty:
diff --git a/compiler/typesrenderer.nim b/compiler/typesrenderer.nim
index 60f9f6603..050a057f4 100644
--- a/compiler/typesrenderer.nim
+++ b/compiler/typesrenderer.nim
@@ -67,7 +67,7 @@ proc renderType(n: PNode): string =
     let typeStr = renderType(n[typePos])
     result = typeStr
     for i in 1..<typePos:
-      assert n[i].kind == nkIdent
+      assert n[i].kind in {nkSym, nkIdent}
       result.add(',' & typeStr)
   of nkTupleTy:
     result = "tuple["
diff --git a/lib/js/jsffi.nim b/lib/js/jsffi.nim
index e79e4e20d..0dce6f3b9 100644
--- a/lib/js/jsffi.nim
+++ b/lib/js/jsffi.nim
@@ -458,6 +458,14 @@ macro `{}`*(typ: typedesc, xs: varargs[untyped]): auto =
 # Macro to build a lambda using JavaScript's `this`
 # from a proc, `this` being the first argument.
 
+proc replaceSyms(n: NimNode): NimNode =
+  if n.kind == nnkSym: 
+    result = newIdentNode($n)
+  else: 
+    result = n
+    for i in 0..<n.len:
+      result[i] = replaceSyms(n[i])
+
 macro bindMethod*(procedure: typed): auto =
   ## Takes the name of a procedure and wraps it into a lambda missing the first
   ## argument, which passes the JavaScript builtin ``this`` as the first
@@ -491,7 +499,7 @@ macro bindMethod*(procedure: typed): auto =
         getImpl(procedure)
       else:
         procedure
-    args = rawProc[3]
+    args = rawProc[3].copyNimTree.replaceSyms
     thisType = args[1][1]
     params = newNimNode(nnkFormalParams).add(args[0])
     body = newNimNode(nnkLambda)
diff --git a/tests/macros/tmacros_various.nim b/tests/macros/tmacros_various.nim
index 64bb7345a..056830837 100644
--- a/tests/macros/tmacros_various.nim
+++ b/tests/macros/tmacros_various.nim
@@ -237,3 +237,11 @@ noop:
   makeVar
 echo tensorY
 
+macro xbenchmark(body: typed): untyped =
+  result = body
+
+xbenchmark:
+  proc fastSHA(inputtest: string) =
+    discard inputtest
+  fastSHA("hey")
+