diff --git a/seahub/api2/endpoints/account.py b/seahub/api2/endpoints/account.py
index 1ec327c644..191f626da8 100644
--- a/seahub/api2/endpoints/account.py
+++ b/seahub/api2/endpoints/account.py
@@ -183,7 +183,7 @@ class Account(APIView):
                 space_quota_mb = int(space_quota_mb)
             except ValueError:
                 return api_error(status.HTTP_400_BAD_REQUEST,
-                        _('Must be an integer that greater than or equal to 0.'))
+                        _('Must be an integer that is greater than or equal to 0.'))
 
             if space_quota_mb < 0:
                 return api_error(status.HTTP_400_BAD_REQUEST,
diff --git a/seahub/institutions/templates/institutions/user_info.html b/seahub/institutions/templates/institutions/user_info.html
index b5a234633f..aadb5988c5 100644
--- a/seahub/institutions/templates/institutions/user_info.html
+++ b/seahub/institutions/templates/institutions/user_info.html
@@ -53,7 +53,7 @@
             <input type="hidden" name="email" value="{{ email }}" />
             <input type="text" name="space_quota" /> MB
             <p class="tip">
-            <span>{% trans "An integer that greater than or equal to 0." %}</span><br />
+            <span>{% trans "An integer that is greater than or equal to 0." %}</span><br />
             <span>{% trans "Tip: 0 means default limit" %}</span>
             </p>
             <p class="error hide"></p>
diff --git a/seahub/templates/sysadmin/sys_org_info_base.html b/seahub/templates/sysadmin/sys_org_info_base.html
index 760f001aeb..dce7c4b3fb 100644
--- a/seahub/templates/sysadmin/sys_org_info_base.html
+++ b/seahub/templates/sysadmin/sys_org_info_base.html
@@ -32,7 +32,7 @@
     <input type="hidden" name="org_id" value="{{ org.org_id }}" />
     <input type="text" name="quota" /> MB
     <p class="tip">
-    <span>{% trans "An integer that greater than or equal to 0." %}</span><br />
+    <span>{% trans "An integer that is greater than or equal to 0." %}</span><br />
     <span>{% trans "Tip: 0 means default limit" %}</span>
     </p>
     <p class="error hide"></p>
diff --git a/seahub/templates/sysadmin/sys_user_admin_ldap_imported.html b/seahub/templates/sysadmin/sys_user_admin_ldap_imported.html
index 9ee33c00a0..3276e1dc26 100644
--- a/seahub/templates/sysadmin/sys_user_admin_ldap_imported.html
+++ b/seahub/templates/sysadmin/sys_user_admin_ldap_imported.html
@@ -79,7 +79,7 @@
     <h3>{% trans "Set user storage limit" %}</h3>
     <input type="text" name="space_quota" /> MB
     <p class="tip">
-    <span>{% trans "An integer that greater than or equal to 0." %}</span><br />
+    <span>{% trans "An integer that is greater than or equal to 0." %}</span><br />
     <span>{% trans "Tip: 0 means default limit" %}</span>
     </p>
     <p class="error hide"></p>
diff --git a/seahub/templates/sysadmin/useradmin_table.html b/seahub/templates/sysadmin/useradmin_table.html
index 4474a51172..9c9012391a 100644
--- a/seahub/templates/sysadmin/useradmin_table.html
+++ b/seahub/templates/sysadmin/useradmin_table.html
@@ -110,7 +110,7 @@
     <h3>{% trans "Set user storage limit" %}</h3>
     <input type="text" name="space_quota" /> MB
     <p class="tip">
-    <span>{% trans "An integer that greater than or equal to 0." %}</span><br />
+    <span>{% trans "An integer that is greater than or equal to 0." %}</span><br />
     <span>{% trans "Tip: 0 means default limit" %}</span>
     </p>
     <p class="error hide"></p>
diff --git a/seahub/templates/sysadmin/userinfo.html b/seahub/templates/sysadmin/userinfo.html
index 80d0d3e25d..15e452c38c 100644
--- a/seahub/templates/sysadmin/userinfo.html
+++ b/seahub/templates/sysadmin/userinfo.html
@@ -102,7 +102,7 @@
             <h3>{% trans "Set user storage limit" %}</h3>
             <input type="text" name="space_quota" /> MB
             <p class="tip">
-            <span>{% trans "An integer that greater than or equal to 0." %}</span><br />
+            <span>{% trans "An integer that is greater than or equal to 0." %}</span><br />
             <span>{% trans "Tip: 0 means default limit" %}</span>
             </p>
             <p class="error hide"></p>