index: don't populate nsec values if GIT_USE_NSEC is off
diff --git a/src/fileops.c b/src/fileops.c
index 5b54298..a13a406 100644
--- a/src/fileops.c
+++ b/src/fileops.c
@@ -1081,6 +1081,9 @@ void git_futils_filestamp_set_from_stat(
if (st) {
stamp->mtime = *statmtime;
+#if !defined(GIT_USE_NSEC)
+ stamp->mtime.tv_nsec = 0;
+#endif
stamp->size = (git_off_t)st->st_size;
stamp->ino = (unsigned int)st->st_ino;
} else {