diff --git a/fs/isofs/isofs.h b/fs/isofs/isofs.h
index 57d4c3e2e94a..8e42b4fbefdc 100644
--- a/fs/isofs/isofs.h
+++ b/fs/isofs/isofs.h
@@ -107,7 +107,7 @@ static inline unsigned int isonum_733(char *p)
 	/* Ignore bigendian datum due to broken mastering programs */
 	return get_unaligned_le32(p);
 }
-extern int iso_date(char *, int);
+extern int iso_date(u8 *, int);
 
 struct inode;		/* To make gcc happy */
 
diff --git a/fs/isofs/rock.h b/fs/isofs/rock.h
index ef03625431bb..ac5cc587d718 100644
--- a/fs/isofs/rock.h
+++ b/fs/isofs/rock.h
@@ -66,7 +66,7 @@ struct RR_PL_s {
 };
 
 struct stamp {
-	char time[7];
+	__u8 time[7];		/* actually 6 unsigned, 1 signed */
 } __attribute__ ((packed));
 
 struct RR_TF_s {
diff --git a/fs/isofs/util.c b/fs/isofs/util.c
index 42544bf0e222..e88dba721661 100644
--- a/fs/isofs/util.c
+++ b/fs/isofs/util.c
@@ -16,7 +16,7 @@
  * to GMT.  Thus  we should always be correct.
  */
 
-int iso_date(char * p, int flag)
+int iso_date(u8 *p, int flag)
 {
 	int year, month, day, hour, minute, second, tz;
 	int crtime;