diff --git a/vmware-host-pooler-api b/vmware-host-pooler-api
index ad52bc3..a1799d4 100755
--- a/vmware-host-pooler-api
+++ b/vmware-host-pooler-api
@@ -60,14 +60,18 @@ post '/vm/:template' do
   if ( ( ! params[:folder] ) or ( ! params[:pool] ))
     result[params[:template]]['error'] = 'You must specify a destination \'folder\' and \'pool\''
   else
-    vm = $redis.srandmember('vmware_host_pool__ready__'+params[:template])
-    $redis.srem('vmware_host_pool__ready__'+params[:template], vm)
-    $redis.sadd('vmware_host_pool__running__'+params[:template], vm)
+    if ( $redis.scard('vmware_host_pool__ready__'+params[:template]) > 0 )
+      vm = $redis.srandmember('vmware_host_pool__ready__'+params[:template])
+      $redis.srem('vmware_host_pool__ready__'+params[:template], vm)
+      $redis.sadd('vmware_host_pool__running__'+params[:template], vm)
 
-    logger.log('s', "[<] '#{vm}' moved to 'running' queue")
+      logger.log('s', "[<] '#{vm}' moved to 'running' queue")
 
-    result[params[:template]]['ok'] = 'true'
-    result[params[:template]]['hostname'] = vm
+      result[params[:template]]['ok'] = 'true'
+      result[params[:template]]['hostname'] = vm
+    else
+      result[params[:template]]['ok'] = 'false'
+    end
   end
 
   JSON.pretty_generate(result)