diff --git a/src/file_frm.c b/src/file_frm.c
index a5e81475..e9e24bd0 100644
--- a/src/file_frm.c
+++ b/src/file_frm.c
@@ -33,7 +33,7 @@
 #include "filegen.h"
 
 
-/*@ requires \valid(file_stat); */
+/*@ requires valid_register_header_check(file_stat); */
 static void register_header_check_frm(file_stat_t *file_stat);
 
 const file_hint_t file_hint_frm= {
@@ -46,12 +46,8 @@ const file_hint_t file_hint_frm= {
 };
 
 /*@
-  @ requires \valid(file_recovery);
-  @ requires \valid(file_recovery->handle);
-  @ requires valid_file_recovery(file_recovery);
-  @ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
-  @ ensures \valid(file_recovery->handle);
-  @ ensures valid_file_recovery(file_recovery);
+  @ requires valid_file_check_param(file_recovery);
+  @ ensures  valid_file_check_result(file_recovery);
   @ assigns *file_recovery->handle, errno, file_recovery->file_size;
   @ assigns Frama_C_entropy_source;
   @*/
@@ -65,13 +61,9 @@ static void file_check_frm(file_recovery_t *file_recovery)
 
 /*@
   @ requires buffer_size >= 18;
-  @ 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_frm, buffer+(..), file_recovery, file_recovery_new);
-  @ ensures \result == 0 || \result == 1;
-  @ ensures  \result!=0 ==> valid_file_recovery(file_recovery_new);
+  @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
+  @ ensures  valid_header_check_result(\result, file_recovery_new);
   @ assigns  *file_recovery_new;
   @*/
 static int header_check_frm(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)