diff --git a/src/file_ibd.c b/src/file_ibd.c
index 0631e756..964fa028 100644
--- a/src/file_ibd.c
+++ b/src/file_ibd.c
@@ -33,6 +33,7 @@
 #include "common.h"
 #include "log.h"
 
+/*@ requires \valid(file_stat); */
 static void register_header_check_ibd(file_stat_t *file_stat);
 
 const file_hint_t file_hint_ibd= {
@@ -49,9 +50,12 @@ const file_hint_t file_hint_ibd= {
 #define FIL_PAGE_TYPE_FSP_HDR	8	/* File space header */
 #define DICT_TF_BITS            6       /* number of flag bits */
 #define DICT_TF_FORMAT_SHIFT    5       /* file format */
+#ifdef __FRAMAC__
+#define DICT_TF_FORMAT_MASK     0x20
+#else
 #define DICT_TF_FORMAT_MASK     \
   ((~(~0U << (DICT_TF_BITS - DICT_TF_FORMAT_SHIFT))) << DICT_TF_FORMAT_SHIFT)
-
+#endif
 #define DICT_TF_FORMAT_ZIP      1       /* InnoDB plugin for 5.1: compressed tables */
 
 struct innodb_fil_header
@@ -66,6 +70,18 @@ struct innodb_fil_header
   uint32_t arch_log_no_or_space_id;
 } __attribute__ ((gcc_struct, __packed__));
 
+/*@
+  @ requires buffer_size >= sizeof(struct innodb_fil_header);
+  @ requires buffer_size >  FSP_HEADER_OFFSET + FSP_SPACE_FLAGS;
+  @ requires \valid_read(buffer+(0..buffer_size-1));
+  @ requires valid_file_recovery(file_recovery);
+  @ requires \valid(file_recovery_new);
+  @ requires file_recovery_new->blocksize > 0;
+  @ requires separation: \separated(&file_hint_ibd, buffer+(..), file_recovery, file_recovery_new);
+  @ ensures \result == 0 || \result == 1;
+  @ ensures  \result!=0 ==> valid_file_recovery(file_recovery_new);
+  @ assigns  *file_recovery_new;
+  @*/
 static int header_check_ibd(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
 {
   const struct innodb_fil_header *hdr=(const struct innodb_fil_header *)buffer;