diff --git a/src/baseline/baseline-compiler.cc b/src/baseline/baseline-compiler.cc
index ed7c09c28a..ef8e1c5f86 100644
--- a/src/baseline/baseline-compiler.cc
+++ b/src/baseline/baseline-compiler.cc
@@ -1493,7 +1493,7 @@ void BaselineCompiler::VisitTestIn() {
   CallBuiltin(Builtins::kKeyedHasICBaseline,
               kInterpreterAccumulatorRegister,  // object
               RegisterOperand(0),               // name
-              IndexAsSmi(1));                   // slot
+              IndexAsTagged(1));                // slot
 }
 
 void BaselineCompiler::VisitTestUndetectable() {