diff --git a/src/ntfs-3g_common.h b/src/ntfs-3g_common.h
index e68c6992..6e573a65 100644
--- a/src/ntfs-3g_common.h
+++ b/src/ntfs-3g_common.h
@@ -118,7 +118,7 @@ typedef struct {
 	unsigned int dmask;
 	ntfs_fuse_streams_interface streams;
 	ntfs_atime_t atime;
-	u64 dmtime;
+	s64 dmtime;
 	BOOL ro;
 	BOOL show_sys_files;
 	BOOL hide_hid_files;