diff --git a/dist/jquery.gridster.js b/dist/jquery.gridster.js
index f5b5fd2be..73551adc0 100644
--- a/dist/jquery.gridster.js
+++ b/dist/jquery.gridster.js
@@ -3795,7 +3795,7 @@
     */
     fn.add_faux_rows = function(rows) {
         var actual_rows = this.rows;
-        var max_rows = actual_rows + (rows || 1);
+        var max_rows = actual_rows + parseInt(rows || 1);
 
         for (var r = max_rows; r > actual_rows; r--) {
             for (var c = this.cols; c >= 1; c--) {
diff --git a/src/jquery.gridster.js b/src/jquery.gridster.js
index 7bac91186..bbfde924c 100755
--- a/src/jquery.gridster.js
+++ b/src/jquery.gridster.js
@@ -2960,7 +2960,7 @@
     */
     fn.add_faux_rows = function(rows) {
         var actual_rows = this.rows;
-        var max_rows = actual_rows + (rows || 1);
+        var max_rows = actual_rows + parseInt(rows || 1);
 
         for (var r = max_rows; r > actual_rows; r--) {
             for (var c = this.cols; c >= 1; c--) {