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-rw-r--r--openbsc/src/auth.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/openbsc/src/auth.c b/openbsc/src/auth.c
index f57b668ef..91039016e 100644
--- a/openbsc/src/auth.c
+++ b/openbsc/src/auth.c
@@ -44,7 +44,7 @@ _use_xor(struct gsm_auth_info *ainfo, struct gsm_auth_tuple *atuple)
for (i=0; i<4; i++)
atuple->sres[i] = atuple->rand[i] ^ ainfo->a3a8_ki[i];
- for (i=8; i<12; i++)
+ for (i=4; i<12; i++)
atuple->kc[i-4] = atuple->rand[i] ^ ainfo->a3a8_ki[i];
return 0;