diff --git a/components/search_engines/util.h b/components/search_engines/util.h
index baf822c..1b7d3eec 100644
--- a/components/search_engines/util.h
+++ b/components/search_engines/util.h
@@ -62,6 +62,7 @@
 
 struct ActionsFromPrepopulateData {
   ActionsFromPrepopulateData();
+  ActionsFromPrepopulateData(const ActionsFromPrepopulateData& other);
   ~ActionsFromPrepopulateData();
 
   TemplateURLService::TemplateURLVector removed_engines;