diff --git a/builtin-fetch-pack.c b/builtin-fetch-pack.c
index 67fb80ec48d6d8f0327628afd86fb366d8f97617..3b210c7fdfd0e5a75e5627099fc8fa183b8c0269 100644
--- a/builtin-fetch-pack.c
+++ b/builtin-fetch-pack.c
@@ -802,14 +802,14 @@ struct ref *fetch_pack(struct fetch_pack_args *my_args,
 
 		mtime.sec = st.st_mtime;
 #ifdef USE_NSEC
-		mtime.usec = st.st_mtim.usec;
+		mtime.nsec = st.st_mtim.tv_nsec;
 #endif
 		if (stat(shallow, &st)) {
 			if (mtime.sec)
 				die("shallow file was removed during fetch");
 		} else if (st.st_mtime != mtime.sec
 #ifdef USE_NSEC
-				|| st.st_mtim.usec != mtime.usec
+				|| st.st_mtim.tv_nsec != mtime.nsec
 #endif
 			  )
 			die("shallow file was changed during fetch");