diff --git a/src/V3Const.cpp b/src/V3Const.cpp
index f86e7c62b..7432524a0 100644
--- a/src/V3Const.cpp
+++ b/src/V3Const.cpp
@@ -3694,9 +3694,9 @@ private:
     // win if bit select is a constant (otherwise we may need to compute bit index several times)
     TREEOPV("AstSel{$fromp.castBufIf1}",                "replaceSelIntoBiop(nodep)");
     TREEOPV("AstSel{$fromp.castNot}",                   "replaceSelIntoUniop(nodep)");
-    TREEOPV("AstSel{$fromp.castAnd,$fromp.castConst}",   "replaceSelIntoUniop(nodep)");
-    TREEOPV("AstSel{$fromp.castOr,$fromp.castConst}",    "replaceSelIntoUniop(nodep)");
-    TREEOPV("AstSel{$fromp.castXor,$fromp.castConst}",   "replaceSelIntoUniop(nodep)");
+    TREEOPV("AstSel{$fromp.castAnd,$lsbp.castConst}",   "replaceSelIntoBiop(nodep)");
+    TREEOPV("AstSel{$fromp.castOr,$lsbp.castConst}",    "replaceSelIntoBiop(nodep)");
+    TREEOPV("AstSel{$fromp.castXor,$lsbp.castConst}",   "replaceSelIntoBiop(nodep)");
     // This visit function here must allow for short-circuiting.
     TREEOPS("AstLogIf{$lhsp.isZero}",  "replaceNum(nodep, 1)");
     TREEOPV("AstLogIf{$lhsp, $rhsp}",  "AstLogOr{AstLogNot{$lhsp},$rhsp}");