diff --git a/src/Expr.cc b/src/Expr.cc
index f9ebde9ea9..e358ff4670 100644
--- a/src/Expr.cc
+++ b/src/Expr.cc
@@ -3039,21 +3039,6 @@ void IndexExpr::ExprDescribe(ODesc* d) const
 		d->Add("]");
 	}
 
-TraversalCode IndexExpr::Traverse(TraversalCallback* cb) const
-	{
-	TraversalCode tc = cb->PreExpr(this);
-	HANDLE_TC_EXPR_PRE(tc);
-
-	tc = op1->Traverse(cb);
-	HANDLE_TC_EXPR_PRE(tc);
-
-	tc = op2->Traverse(cb);
-	HANDLE_TC_EXPR_PRE(tc);
-
-	tc = cb->PostExpr(this);
-	HANDLE_TC_EXPR_POST(tc);
-	}
-
 FieldExpr::FieldExpr(ExprPtr arg_op, const char* arg_field_name)
 	: UnaryExpr(EXPR_FIELD, std::move(arg_op)),
 	  field_name(util::copy_string(arg_field_name)), td(nullptr), field(0)
diff --git a/src/Expr.h b/src/Expr.h
index 4df84bf30e..cb1644404b 100644
--- a/src/Expr.h
+++ b/src/Expr.h
@@ -923,8 +923,6 @@ public:
 	// not necessarily return a vector.
 	ValPtr Eval(Frame* f) const override;
 
-	TraversalCode Traverse(TraversalCallback* cb) const override;
-
 	bool IsSlice() const { return is_slice; }
 
 	// Optimization-related: