diff --git a/src/file_xm.c b/src/file_xm.c
index 49325923..f33172ef 100644
--- a/src/file_xm.c
+++ b/src/file_xm.c
@@ -211,11 +211,9 @@ static int parse_instruments(file_recovery_t *fr, uint16_t instrs)
 }
 
 /*@
-  @ requires \valid(fr);
-  @ requires valid_file_recovery(fr);
-  @ requires \separated(fr, fr->handle, fr->extension, &errno, &Frama_C_entropy_source);
   @ requires fr->file_check == &file_check_xm;
-  @ ensures \valid(fr->handle);
+  @ requires valid_file_check_param(fr);
+  @ ensures  valid_file_check_result(fr);
   @ assigns *fr->handle, fr->file_size, fr->offset_error;
   @ assigns Frama_C_entropy_source, errno;
   @*/
@@ -261,13 +259,9 @@ static void file_check_xm(file_recovery_t *fr)
 }
 
 /*@
-  @ requires buffer_size > 0;
-  @ 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_xm, buffer+(..), file_recovery, file_recovery_new);
-  @ 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_xm(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)