diff --git a/tailbone/templates/batch/inventory/desktop_form.mako b/tailbone/templates/batch/inventory/desktop_form.mako
index 720084f6..77d573dd 100644
--- a/tailbone/templates/batch/inventory/desktop_form.mako
+++ b/tailbone/templates/batch/inventory/desktop_form.mako
@@ -12,11 +12,21 @@
         % if allow_cases:
         var cases = parseFloat($('#cases').val());
         if (!isNaN(cases)) {
+            if (cases > 999999) {
+                alert("Case amount is invalid!");
+                $('#cases').select().focus();
+                return false;
+            }
             return true;
         }
         % endif
         var units = parseFloat($('#units').val());
         if (!isNaN(units)) {
+            if (units > 999999) {
+                alert("Unit amount is invalid!");
+                $('#units').select().focus();
+                return false;
+            }
             return true;
         }
         alert("Please provide case and/or unit quantity");