diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 4b0db6a..908555b 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -37,7 +37,8 @@ extern int map_smb2_to_linux_error(char *buf, bool log_err);
 extern int smb2_check_message(char *buf, unsigned int length,
 			      struct TCP_Server_Info *server);
 extern unsigned int smb2_calc_size(void *buf, struct TCP_Server_Info *server);
-extern char *smb2_get_data_area_len(int *off, int *len, struct smb2_hdr *hdr);
+extern char *smb2_get_data_area_len(int *off, int *len,
+				    struct smb2_sync_hdr *shdr);
 extern __le16 *cifs_convert_path_to_utf16(const char *from,
 					  struct cifs_sb_info *cifs_sb);