diff --git a/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.controller.js b/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.controller.js
index 0297421fce..186a2c2136 100644
--- a/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.controller.js
+++ b/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.controller.js
@@ -56,6 +56,7 @@
   ) {
 
     var ctrl = this;
+    ctrl.volumeSizeError = gettext('Volume size is required and must be an integer');
 
     // Error text for invalid fields
     /*eslint-disable max-len */
@@ -539,10 +540,10 @@
         }
         var volumeSizeText = gettext('The volume size must be at least %(minVolumeSize)s GB');
         var volumeSizeObj = { minVolumeSize: ctrl.minVolumeSize };
-        ctrl.volumeSizeError = interpolate(volumeSizeText, volumeSizeObj, true);
+        ctrl.minVolumeSizeError = interpolate(volumeSizeText, volumeSizeObj, true);
       } else {
         ctrl.minVolumeSize = 0;
-        ctrl.volumeSizeError = gettext('Volume size is required and must be an integer');
+        ctrl.minVolumeSizeError = gettext('Volume size is required and must be an integer');
       }
     }
 
diff --git a/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.html b/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.html
index 6aa4c1d3f6..03d00b40a9 100644
--- a/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.html
+++ b/openstack_dashboard/dashboards/project/static/dashboard/project/workflow/launch-instance/source/source.html
@@ -63,7 +63,7 @@
             <span class="hz-icon-required fa fa-asterisk"></span>
           </label>
           <input name="volume-size"
-                 min="{$ ctrl.minVolumeSize $}"
+                 validate-number-min="{$ ctrl.minVolumeSize $}"
                  id="volume-size"
                  type="number"
                  class="form-control"