diff --git a/lib/plugins/pump.js b/lib/plugins/pump.js
index f23dd70b..7e71c21e 100644
--- a/lib/plugins/pump.js
+++ b/lib/plugins/pump.js
@@ -137,7 +137,7 @@ function init (ctx) {
 
   function virtAsstReservoirHandler (next, slots, sbx) {
     var reservoir = sbx.properties.pump.pump.reservoir;
-    if (reservoir) {
+    if (reservoir || reservoir === 0) {
       var response = translate('virtAsstReservoir', {
         params: [
             reservoir