diff --git a/astriumnet.c b/astriumnet.c
index 24de472..47ecc41 100644
--- a/astriumnet.c
+++ b/astriumnet.c
@@ -25,6 +25,7 @@
 #include <dynstring.h>
 #include <mxml.h>
 
+
 extern char *trim(char *);
 
 typedef struct {
@@ -141,6 +142,8 @@ static long long calculateToken(char *password, long long hash)
   long long tmp;
   int i;
 
+  assert(sizeof(hash) == 8);
+
   tmp = hash ^ 0x80AA80AA;
   for(i = 0; i < strlen(password); i++){
     tmp += password[i] * (long long)pow(2,i);