diff --git a/core/procedures.js b/core/procedures.js
index 59c364719..28d55b0cf 100644
--- a/core/procedures.js
+++ b/core/procedures.js
@@ -87,7 +87,7 @@ Blockly.Procedures.allProcedures = function(root) {
  * @private
  */
 Blockly.Procedures.procTupleComparator_ = function(ta, tb) {
-  return ta[0].toLowerCase().localeCompare(tb[0].toLowerCase());
+  return ta[0].localeCompare(tb[0], undefined, {sensitivity: 'base'});
 };
 
 /**
diff --git a/core/variable_model.js b/core/variable_model.js
index d1e477a3b..eaa3815c5 100644
--- a/core/variable_model.js
+++ b/core/variable_model.js
@@ -87,13 +87,5 @@ Blockly.VariableModel.prototype.getId = function() {
  * @package
  */
 Blockly.VariableModel.compareByName = function(var1, var2) {
-  var name1 = var1.name.toLowerCase();
-  var name2 = var2.name.toLowerCase();
-  if (name1 < name2) {
-    return -1;
-  } else if (name1 == name2) {
-    return 0;
-  } else {
-    return 1;
-  }
+  return var1.name.localeCompare(var2.name, undefined, {sensitivity: 'base'});
 };