diff --git a/data/numex/rules/la.json b/data/numex/rules/la.json
index 54b92c01..fa928e56 100644
--- a/data/numex/rules/la.json
+++ b/data/numex/rules/la.json
@@ -1,4 +1,5 @@
 {
+    "whole_words_only": true,
     "rules": [
         {
             "name": "i",