diff --git a/crypto/bio/bss_dgram.c b/crypto/bio/bss_dgram.c
index bb64e88a4..a223b8367 100644
--- a/crypto/bio/bss_dgram.c
+++ b/crypto/bio/bss_dgram.c
@@ -381,8 +381,8 @@ static long dgram_ctrl(BIO *b, int cmd, long num, void *ptr)
 	int *ip;
 	struct sockaddr *to = NULL;
 	bio_dgram_data *data = NULL;
-	int sockopt_val = 0;
 #if defined(OPENSSL_SYS_LINUX) && (defined(IP_MTU_DISCOVER) || defined(IP_MTU))
+	int sockopt_val = 0;
 	socklen_t sockopt_len;	/* assume that system supporting IP_MTU is
 				 * modern enough to define socklen_t */
 	socklen_t addr_len;