From 27883b52d661cb0c6ecdc79c89ca97f90425e2ea Mon Sep 17 00:00:00 2001
From: Wilson Snyder <wsnyder@wsnyder.org>
Date: Sat, 13 Nov 2021 10:42:26 -0500
Subject: [PATCH] Internals: Add const

---
 src/V3Cast.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/V3Cast.cpp b/src/V3Cast.cpp
index de912c72e..d8db3abe1 100644
--- a/src/V3Cast.cpp
+++ b/src/V3Cast.cpp
@@ -155,7 +155,7 @@ private:
         }
     }
     virtual void visit(AstVarRef* nodep) override {
-        AstNode* const backp = nodep->backp();
+        const AstNode* const backp = nodep->backp();
         if (nodep->access().isReadOnly() && !VN_IS(backp, CCast) && VN_IS(backp, NodeMath)
             && !VN_IS(backp, ArraySel) && !VN_IS(backp, RedXor) && backp->width()
             && castSize(nodep) != castSize(nodep->varp())) {