diff --git a/index.js b/index.js
index 93b6ad5..9b778a4 100644
--- a/index.js
+++ b/index.js
@@ -40,7 +40,7 @@ var russianPluralGroups = function (n) {
   if (lastTwo !== 11 && end === 1) {
     return 0;
   }
-  if (end >= 2 && end <= 4 && !(lastTwo >= 12 && lastTwo <= 14)) {
+  if (2 <= end && end <= 4 && !(lastTwo >= 12 && lastTwo <= 14)) {
     return 1;
   }
   return 2;
@@ -73,7 +73,7 @@ var defaultPluralRules = {
     polish: function (n) {
       if (n === 1) { return 0; }
       var end = n % 10;
-      return end >= 2 && end <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
+      return 2 <= end && end <= 4 && (n % 100 < 10 || n % 100 >= 20) ? 1 : 2;
     },
     icelandic: function (n) { return (n % 10 !== 1 || n % 100 === 11) ? 1 : 0; },
     slovenian: function (n) {