diff --git a/lib/isc/random.c b/lib/isc/random.c
index 085081aa69..cc6c3a280f 100644
--- a/lib/isc/random.c
+++ b/lib/isc/random.c
@@ -166,7 +166,7 @@ isc_random_buf(void *buf, size_t buflen)
 /* Use crypto library as fallback when no other CSPRNG is available */
 # if defined(OPENSSL)
 	if (RAND_bytes(buf, buflen) < 1) {
-		FATAL_ERROR(__FILE__, __LINE__, "FATAL: RAND_bytes(): %s\n", ERR_error_string(ERR_get_error(), NULL));
+		FATAL_ERROR(__FILE__, __LINE__, "RAND_bytes(): %s", ERR_error_string(ERR_get_error(), NULL));
 	}
 # elif defined(PKCS11CRYPTO)
 	RUNTIME_CHECK(pk11_rand_bytes(buf, buflen) == ISC_R_SUCCESS);