diff --git a/types/modernizr/tslint.json b/types/modernizr/tslint.json
index 2279635eb4..bd2b0c4334 100644
--- a/types/modernizr/tslint.json
+++ b/types/modernizr/tslint.json
@@ -1,7 +1,7 @@
 {
     "extends": "dtslint/dt.json",
     "rules": {
-        "no-single-declare-module": false,
+        "no-single-declare-module": true,
         "no-empty-interface": false
     }
 }