diff --git a/src/libfetchers/git-utils.cc b/src/libfetchers/git-utils.cc
index 1ec50099b..ffcc92fc7 100644
--- a/src/libfetchers/git-utils.cc
+++ b/src/libfetchers/git-utils.cc
@@ -130,11 +130,6 @@ T peelObject(git_repository * repo, git_object * obj, git_object_t type)
     return obj2;
 }
 
-int statusCallbackTrampoline(const char * path, unsigned int statusFlags, void * payload)
-{
-    return (*((std::function<int(const char * path, unsigned int statusFlags)> *) payload))(path, statusFlags);
-}
-
 struct GitRepoImpl : GitRepo, std::enable_shared_from_this<GitRepoImpl>
 {
     CanonPath path;
@@ -255,6 +250,12 @@ struct GitRepoImpl : GitRepo, std::enable_shared_from_this<GitRepoImpl>
         return result;
     }
 
+    // Helper for statusCallback below.
+    static int statusCallbackTrampoline(const char * path, unsigned int statusFlags, void * payload)
+    {
+        return (*((std::function<int(const char * path, unsigned int statusFlags)> *) payload))(path, statusFlags);
+    }
+
     WorkdirInfo getWorkdirInfo() override
     {
         WorkdirInfo info;