diff --git a/.flowconfig b/.flowconfig
index 9c7134c3659..78e4e1976b8 100644
--- a/.flowconfig
+++ b/.flowconfig
@@ -41,6 +41,7 @@ flow-github/
 emoji=true
 
 esproposal.optional_chaining=enable
+esproposal.nullish_coalescing=enable
 
 module.system=haste
 module.system.haste.use_name_reducers=true