diff --git a/compiler/semmagic.nim b/compiler/semmagic.nim
index 7838466501..87e7497361 100644
--- a/compiler/semmagic.nim
+++ b/compiler/semmagic.nim
@@ -512,12 +512,14 @@ proc magicsAfterOverloadResolution(c: PContext, n: PNode,
     if n[^1].kind == nkSym and n[^1].sym.kind notin {skProc, skFunc}:
       localError(c.config, n.info, "finalizer must be a direct reference to a proc")
     elif optTinyRtti in c.config.globalOptions:
+      let fin = if n[^1].kind == nkLambda: n[^1][namePos].sym
+                else: n[^1].sym
       # check if we converted this finalizer into a destructor already:
-      let t = whereToBindTypeHook(c, n[^1].sym.typ[1].skipTypes(abstractInst+{tyRef}))
-      if t != nil and t.attachedOps[attachedDestructor] != nil and t.attachedOps[attachedDestructor].owner == n[^1].sym:
+      let t = whereToBindTypeHook(c, fin.typ[1].skipTypes(abstractInst+{tyRef}))
+      if t != nil and t.attachedOps[attachedDestructor] != nil and t.attachedOps[attachedDestructor].owner == fin:
         discard "already turned this one into a finalizer"
       else:
-        bindTypeHook(c, turnFinalizerIntoDestructor(c, n[^1].sym, n.info), n, attachedDestructor)
+        bindTypeHook(c, turnFinalizerIntoDestructor(c, fin, n.info), n, attachedDestructor)
     result = n
   of mDestroy:
     result = n