diff --git a/src/libcharon/sa/ikev1/keymat_v1.c b/src/libcharon/sa/ikev1/keymat_v1.c
index bcea1f388..34bae4391 100644
--- a/src/libcharon/sa/ikev1/keymat_v1.c
+++ b/src/libcharon/sa/ikev1/keymat_v1.c
@@ -416,6 +416,7 @@ METHOD(keymat_v1_t, derive_ike_keys, bool,
 	{
 		chunk_clear(&g_xy);
 		chunk_clear(&data);
+		chunk_clear(&skeyid);
 		return FALSE;
 	}
 	chunk_clear(&data);
@@ -427,6 +428,7 @@ METHOD(keymat_v1_t, derive_ike_keys, bool,
 	{
 		chunk_clear(&g_xy);
 		chunk_clear(&data);
+		chunk_clear(&skeyid);
 		return FALSE;
 	}
 	chunk_clear(&data);
@@ -438,6 +440,7 @@ METHOD(keymat_v1_t, derive_ike_keys, bool,
 	{
 		chunk_clear(&g_xy);
 		chunk_clear(&data);
+		chunk_clear(&skeyid);
 		return FALSE;
 	}
 	chunk_clear(&data);