diff --git a/supportedBackends/google/batch/src/main/scala/cromwell/backend/google/batch/util/BatchUtilityConversions.scala b/supportedBackends/google/batch/src/main/scala/cromwell/backend/google/batch/util/BatchUtilityConversions.scala
index 87b4762f5a5..612c95651e9 100644
--- a/supportedBackends/google/batch/src/main/scala/cromwell/backend/google/batch/util/BatchUtilityConversions.scala
+++ b/supportedBackends/google/batch/src/main/scala/cromwell/backend/google/batch/util/BatchUtilityConversions.scala
@@ -8,10 +8,9 @@ import wom.format.MemorySize
 
 trait BatchUtilityConversions {
 
-
   // construct zones string
   def toZonesPath(zones: Vector[String]): String = {
-    "zones/" + zones.mkString(",")
+    zones.map(zone => "zones/" + zone).mkString(" ")
   }
 
   // lowercase text to match gcp label requirements