diff --git a/compiler/ccgexprs.nim b/compiler/ccgexprs.nim
index 5859abd8b4..6b2a644099 100644
--- a/compiler/ccgexprs.nim
+++ b/compiler/ccgexprs.nim
@@ -1006,7 +1006,7 @@ proc genTupleElem(p: BProc, e: PNode, d: var TLoc) =
   var
     i: int = 0
   var a: TLoc = initLocExpr(p, e[0])
-  let tupType = a.t.skipTypes(abstractInst+{tyVar})
+  let tupType = a.t.skipTypes(abstractInst+{tyVar}+tyUserTypeClasses) # ref #25227
   assert tupType.kind == tyTuple
   d.inheritLocation(a)
   discard getTypeDesc(p.module, a.t) # fill the record's fields.loc
diff --git a/compiler/jsgen.nim b/compiler/jsgen.nim
index acd49110ab..c52b26e69b 100644
--- a/compiler/jsgen.nim
+++ b/compiler/jsgen.nim
@@ -1375,7 +1375,8 @@ proc genFieldAddr(p: PProc, n: PNode, r: var TCompRes) =
   r.typ = etyBaseIndex
   let b = if n.kind == nkHiddenAddr: n[0] else: n
   gen(p, b[0], a)
-  if skipTypes(b[0].typ, abstractVarRange).kind == tyTuple:
+  if skipTypes(b[0].typ, abstractVarRange + tyTypeClasses).kind == tyTuple:
+    # ref #25227 about `+ tyTypeClasses`
     r.res = makeJSString("Field" & $getFieldPosition(p, b[1]))
   else:
     if b[1].kind != nkSym: internalError(p.config, b[1].info, "genFieldAddr")