diff --git a/src/js/rulesAssistantOptions.js b/src/js/rulesAssistantOptions.js
index 5c215c53fe53eab987f6138a727c72ea193ac41f..7bd075e22fea34b3e754d64794b98f7b05f4c46f 100644
--- a/src/js/rulesAssistantOptions.js
+++ b/src/js/rulesAssistantOptions.js
@@ -289,7 +289,7 @@ window.rulesAssistantOptions = (function() {
 		}
 
 		parse(what) {
-			return what === "" ? this.nullValue : what;
+			return what === "" ? this.nullValue : parseInt(what);
 		}
 	}