Beef up completion tests

1 files changed, 1 insertions, 1 deletions

diff --git a/function.h b/function.h
index 2f8dfc36..fd945570 100644
--- a/function.h
+++ b/function.h
@@ -39,7 +39,7 @@ struct function_data_t
     /**
        Function definition
      */
-    wchar_t *definition;
+    const wchar_t *definition;
     /**
        List of all event handlers for this function
      */