diff --git a/syntaxes/fjsx15/flowtype/indexer.sublime-syntax b/syntaxes/fjsx15/flowtype/indexer.sublime-syntax
index f79530cf..f8a0145c 100644
--- a/syntaxes/fjsx15/flowtype/indexer.sublime-syntax
+++ b/syntaxes/fjsx15/flowtype/indexer.sublime-syntax
@@ -29,7 +29,7 @@ variables:
 contexts:
   main:
     - match: |
-        (?x)
+        (?x)^
         (?:\s*
           (?>(\+)|(-))
         )?