diff --git a/Libraries/LibJS/AST.cpp b/Libraries/LibJS/AST.cpp
index 70e1992a79..bd7fa5ee38 100644
--- a/Libraries/LibJS/AST.cpp
+++ b/Libraries/LibJS/AST.cpp
@@ -163,7 +163,7 @@ Value CallExpression::execute(Interpreter& interpreter, GlobalObject& global_obj
         if (interpreter.exception())
             return {};
         if (m_arguments[i].is_spread) {
-            get_iterator_values(global_object, value, [&](Value& iterator_value) {
+            get_iterator_values(global_object, value, [&](Value iterator_value) {
                 if (interpreter.exception())
                     return IterationDecision::Break;
                 arguments.append(iterator_value);
@@ -419,7 +419,7 @@ Value ForOfStatement::execute(Interpreter& interpreter, GlobalObject& global_obj
     if (interpreter.exception())
         return {};
 
-    get_iterator_values(global_object, rhs_result, [&](Value& value) {
+    get_iterator_values(global_object, rhs_result, [&](Value value) {
         interpreter.set_variable(variable_name, value, global_object);
         last_value = interpreter.run(global_object, *m_body);
         if (interpreter.exception())
@@ -1652,7 +1652,7 @@ Value ArrayExpression::execute(Interpreter& interpreter, GlobalObject& global_ob
                 return {};
 
             if (element->is_spread_expression()) {
-                get_iterator_values(global_object, value, [&](Value& iterator_value) {
+                get_iterator_values(global_object, value, [&](Value iterator_value) {
                     array->indexed_properties().append(iterator_value);
                     return IterationDecision::Continue;
                 });
diff --git a/Libraries/LibJS/Runtime/ArrayConstructor.cpp b/Libraries/LibJS/Runtime/ArrayConstructor.cpp
index 4e0715038c..c71c301147 100644
--- a/Libraries/LibJS/Runtime/ArrayConstructor.cpp
+++ b/Libraries/LibJS/Runtime/ArrayConstructor.cpp
@@ -108,7 +108,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
         array->set_indexed_property_elements(move(elements));
     } else {
         // * iterable objects
-        get_iterator_values(global_object, value, [&](Value& element) {
+        get_iterator_values(global_object, value, [&](Value element) {
             if (interpreter.exception())
                 return IterationDecision::Break;
             array->indexed_properties().append(element);
diff --git a/Libraries/LibJS/Runtime/IteratorOperations.cpp b/Libraries/LibJS/Runtime/IteratorOperations.cpp
index 38c935a455..553aaf04fb 100644
--- a/Libraries/LibJS/Runtime/IteratorOperations.cpp
+++ b/Libraries/LibJS/Runtime/IteratorOperations.cpp
@@ -101,7 +101,7 @@ Value create_iterator_result_object(GlobalObject& global_object, Value value, bo
     return object;
 }
 
-void get_iterator_values(GlobalObject& global_object, Value value, AK::Function<IterationDecision(Value&)> callback)
+void get_iterator_values(GlobalObject& global_object, Value value, AK::Function<IterationDecision(Value)> callback)
 {
     auto& interpreter = global_object.interpreter();
 
diff --git a/Libraries/LibJS/Runtime/IteratorOperations.h b/Libraries/LibJS/Runtime/IteratorOperations.h
index 7c39505bd5..db113eec97 100644
--- a/Libraries/LibJS/Runtime/IteratorOperations.h
+++ b/Libraries/LibJS/Runtime/IteratorOperations.h
@@ -41,6 +41,6 @@ Value create_iterator_result_object(GlobalObject&, Value value, bool done);
 Object* iterator_next(Object& iterator, Value value = {});
 void iterator_close(Object& iterator);
 
-void get_iterator_values(GlobalObject&, Value value, AK::Function<IterationDecision(Value&)> callback);
+void get_iterator_values(GlobalObject&, Value value, AK::Function<IterationDecision(Value)> callback);
 
 }