diff --git a/src/js/controllers/preferencesFee.js b/src/js/controllers/preferencesFee.js
index 1811f4f32..9339b413e 100644
--- a/src/js/controllers/preferencesFee.js
+++ b/src/js/controllers/preferencesFee.js
@@ -80,8 +80,9 @@ angular.module('copayApp.controllers').controller('preferencesFeeController', fu
   var showCustomFeePrompt = function() {
     $scope.invalidCustomFeeEntered = true;
     $scope.showMaxWarning = false;
+    $scope.showMinWarning = false;
     popupService.showPrompt(gettextCatalog.getString('Custom Fee'), gettextCatalog.getString('Set your own fee in satoshis/byte'), null, function(text) {
-      if (!text || !parseInt(text)) return;
+      if (!text || !parseInt(text) || parseInt(text) <= 0) return;
       $scope.feePerSatByte = parseInt(text);
       $scope.customFeePerKB = ($scope.feePerSatByte * 1000).toFixed();
       setMaxWarning();
diff --git a/www/views/modals/chooseFeeLevel.html b/www/views/modals/chooseFeeLevel.html
index 90d59169d..c651b146d 100644
--- a/www/views/modals/chooseFeeLevel.html
+++ b/www/views/modals/chooseFeeLevel.html
@@ -31,7 +31,7 @@
     </div>
     <div class="comment" ng-if="showMinWarning">
       <i class="icon"><img src="img/icon-warning.png"></i>
-      <span class="text" translate>Your fee is lower than the minimum recommended ({{getMinimumRecommeded()}} satoshis/byte). Your transaction may never get confirmed.</span>
+      <span class="text" translate>Your fee is lower than the recommended super economy fee ({{getMinimumRecommeded()}} satoshis/byte). Your transaction may never get confirmed.</span>
     </div>
     <div class="comment" ng-if="showMaxWarning">
       <i class="icon"><img src="img/icon-warning.png"></i>