diff --git a/src/js/timepicker/index.js b/src/js/timepicker/index.js
index 68212ca..67af6b7 100644
--- a/src/js/timepicker/index.js
+++ b/src/js/timepicker/index.js
@@ -391,7 +391,7 @@ var TimePicker = defineClass(
 
     makeDisabledStatItems: function(hourItems) {
       var result = [];
-      var disabledHours = this.disabledHours.concat();
+      var disabledHours = this.disabledHours.slice();
 
       if (this.showMeridiem) {
         disabledHours = this.meridiemableTime(disabledHours);
@@ -719,7 +719,7 @@ var TimePicker = defineClass(
         disabledHours = disabledHours.concat(util.getRangeArr(endHour + 1, END_NUMBER_OF_HOUR));
       }
 
-      this.disabledHours = disabledHours.concat();
+      this.disabledHours = disabledHours.slice();
     },
 
     /**
@@ -732,24 +732,32 @@ var TimePicker = defineClass(
      */
     setRangeMinute: function(beginHour, beginMin, endHour, endMin) {
       var disabledMinRanges = [];
+
+      if (!beginHour && !beginMin) {
+        return;
+      }
+
       disabledMinRanges.push({
         begin: START_NUMBER_OF_TIME,
         end: beginMin
       });
 
-      if (endMin) {
+      if (endHour && endMin) {
         disabledMinRanges.push({
           begin: endMin,
           end: END_NUMBER_OF_MINUTE
         });
-      }
 
-      if (disabledMinRanges.length > 1 && beginHour === endHour) {
-        this.disabledMinutes[beginHour] = util.getDisabledMinuteArr(disabledMinRanges).concat();
-      } else {
-        this.disabledMinutes[beginHour] = util.getDisabledMinuteArr([disabledMinRanges[0]]).concat();
-        this.disabledMinutes[endHour] = util.getDisabledMinuteArr([disabledMinRanges[1]]).concat();
+        if (beginHour === endHour) {
+          this.disabledMinutes[beginHour] = util.getDisabledMinuteArr(disabledMinRanges).slice();
+
+          return;
+        }
+
+        this.disabledMinutes[endHour] = util.getDisabledMinuteArr([disabledMinRanges[1]]).slice();
       }
+
+      this.disabledMinutes[beginHour] = util.getDisabledMinuteArr([disabledMinRanges[0]]).slice();
     },
 
     /**
diff --git a/test/timepicker/timepicker.spec.js b/test/timepicker/timepicker.spec.js
index 669593a..b6d4e54 100644
--- a/test/timepicker/timepicker.spec.js
+++ b/test/timepicker/timepicker.spec.js
@@ -337,6 +337,48 @@ describe('Set selectable range', function() {
     });
   });
 
+  it('should set selectable range on hour with only begin', function() {
+    var start = makeRangeObj(9, 30);
+    var hourSelect, selectOptions, disabledHours, selectableHours;
+
+    timepickerNoMeridiem.setRange(start);
+
+    hourSelect = timepickerNoMeridiem.element.querySelector('select[aria-label="Time"]');
+
+    selectOptions = Array.from(hourSelect.querySelectorAll('option'));
+    disabledHours = selectOptions.slice(0, 9);
+    selectableHours = selectOptions.slice(9);
+
+    disabledHours.forEach(function(disabledHour) {
+      expect(disabledHour).toMatchObject({disabled: true});
+    });
+
+    selectableHours.forEach(function(selectableHour) {
+      expect(selectableHour).toMatchObject({disabled: false});
+    });
+  });
+
+  it('should set selectable range on minute with only begin', function() {
+    var start = makeRangeObj(9, 30);
+    var minSelect, selectOptions, disabledMins, selectableMins;
+
+    timepickerNoMeridiem.setRange(start);
+    timepickerNoMeridiem.setTime(9, 0);
+
+    minSelect = timepickerNoMeridiem.element.querySelectorAll('select[aria-label="Time"]')[1];
+    selectOptions = Array.from(minSelect.querySelectorAll('option'));
+    disabledMins = selectOptions.slice(0, 31);
+    selectableMins = selectOptions.slice(31);
+
+    disabledMins.forEach(function(disabledMin) {
+      expect(disabledMin).toMatchObject({disabled: true});
+    });
+
+    selectableMins.forEach(function(selectableMin) {
+      expect(selectableMin).toMatchObject({disabled: false});
+    });
+  });
+
   it('should disable a meridiem selector when range included in the other', function() {
     var start = makeRangeObj(6, 30);
     var end = makeRangeObj(11, 30);