diff --git a/lib/modules/database.js b/lib/modules/database.js
index 5c4b27e..6ebdecc 100644
--- a/lib/modules/database.js
+++ b/lib/modules/database.js
@@ -111,9 +111,10 @@ class DatabaseQuery {
     }
     Object.keys(this.filters)
       .forEach(key => {
-        const filter = this.filters[key];
+        let filter = this.filters[key];
         if (filter) {
-          const filterArgs = ([key].concat(filter)).join(argsSeparator)
+          const cleanFilters = filter.filter((f) => typeof f !== "undefined");
+          const filterArgs = ([key].concat(cleanFilters)).join(argsSeparator);
           modifiers.push(filterArgs);
         }
       })