diff --git a/src/compiler/OptTree-Spec.ref b/src/compiler/OptTree-Spec.ref
index d01431a3..28176a95 100644
--- a/src/compiler/OptTree-Spec.ref
+++ b/src/compiler/OptTree-Spec.ref
@@ -669,7 +669,7 @@ SpecCall-Aux {
   (e.Name) (e.SpecPattern) (e.Body) s.NextNumber e.Signatures
   (e.OldArg) (e.NewArg) (e.Sg) (e.Solutions) (e.History)
   s.NeedRelationCheck
-    , <IsTrivialSignature e.NewArg> : True
+    , <IsTrivialSignature e.NewArg (e.Body)> : True
     = ((e.SpecPattern) (e.Body) s.NextNumber e.Signatures)
       (CallBrackets (Symbol Name e.Name) e.OldArg)
       /* пусто */ (/* пусто */);
@@ -1006,9 +1006,55 @@ RemoveLastGhostBracket {
 }
 
 IsTrivialSignature {
-  e.Arg, e.Arg : (Var 'e' e._) = True;
+  e.Arg (e.Body), <IsHardExpr e.Arg> : False = False (e.Arg) (e.Body);
+  e.Arg (e.Body) = <DoIsTrivialSignature e.Arg (/* scanned */) (e.Body)>;
+}
+
+DoIsTrivialSignature {
+  e.Arg (e.ScannedSentences) (/* кончились предложения */)
+    = True (e.Arg) (e.ScannedSentences);
+
+  e.Arg (e.ScannedSentences) (((e.Pattern) e.Tail) e.Sentences)
+    , <GenericMatch (e.Pattern) (e.Arg)> : Clear e._
+    = <DoIsTrivialSignature
+        e.Arg (e.ScannedSentences ((e.Pattern) e.Tail)) (e.Sentences)
+      >;
+
+  e.Arg (e.ScannedSentences) (e.Sentences)
+    = False (e.Arg) (e.ScannedSentences e.Sentences);
+}
+
+IsHardExpr {
+  e.Expr
+    , <IsHardExpr-Aux e.Expr>
+    : {
+        e._ OpenE e._ = False;
+        e._ Closure e._ = False;
+        e._ (s.Mode e.Index) e._ (s.Mode e.Index) e._ = False;
+        e._ = True;
+      }
+}
 
-  e.Arg = False;
+/*
+  <IsHardExpr-Aux e.Expr> == t.IsHardExpr-Aux*
+  t.IsHardExpr-Aux ::= OpenE | (s.Mode e.Index) | Closure
+*/
+IsHardExpr-Aux {
+  e.Expr-B (Var 'e' e.Index1) e.Expr-M (Var 'e' e.Index2) e.Expr-E = OpenE;
+
+  e.Expr
+    = <Map
+        {
+          (Var s.Mode e.Index) = (s.Mode e.Index);
+
+          (Brackets e.InBrackets) = <IsHardExpr-Aux e.InBrackets>;
+          (ADT-Brackets (e.Name) e.InBrackets) = <IsHardExpr-Aux e.InBrackets>;
+          (ClosureBrackets e._) = Closure;
+
+          t.Other = /* пропускаем */;
+        }
+        e.Expr
+      >;
 }
 
 OrderUniqueVars {