diff --git a/src/db/pool.cr b/src/db/pool.cr
index 9cc1de5..b88c109 100644
--- a/src/db/pool.cr
+++ b/src/db/pool.cr
@@ -200,8 +200,11 @@ module DB
         end
       end
 
-      if idle_pushed && are_waiting_for_resource?
-        @availability_channel.send nil
+      if idle_pushed
+        select
+        when @availability_channel.send(nil)
+        else
+        end
       end
     end