diff --git a/src/ssl_sock.c b/src/ssl_sock.c
index 818f8ab..abb09d0 100644
--- a/src/ssl_sock.c
+++ b/src/ssl_sock.c
@@ -4980,7 +4980,7 @@
 
 		/* leave init state and start handshake */
 		conn->flags |= CO_FL_SSL_WAIT_HS | CO_FL_WAIT_L6_CONN;
-#if OPENSSL_VERSION_NUMBER >= 0x0101000L
+#if OPENSSL_VERSION_NUMBER >= 0x10101000L
 		conn->flags |= CO_FL_EARLY_SSL_HS;
 #endif