--- DSA.xs.orig 2009-08-05 12:18:29.000000000 +0200 +++ DSA.xs 2009-08-05 12:19:04.000000000 +0200 @@ -54,7 +54,7 @@ } dsa = DSA_generate_parameters(bits, seedpv, seed_len, NULL, NULL, NULL, NULL); if (!dsa) - croak(ERR_reason_error_string(ERR_get_error())); + croak("%s", ERR_reason_error_string(ERR_get_error())); RETVAL = dsa; OUTPUT: RETVAL