diff --git a/src/fb_intercept.hh b/src/fb_intercept.hack
similarity index 99%
rename from src/fb_intercept.hh
rename to src/fb_intercept.hack
index 31efeb8..38ba9d8 100644
--- a/src/fb_intercept.hh
+++ b/src/fb_intercept.hack
@@ -1,5 +1,3 @@
-<?hh // strict
-
 namespace Quizlet\FBInterceptPolyfill;
 
 use type HH\Lib\Ref;