diff --git a/ssl/ssltest.c b/ssl/ssltest.c
index 1c05638ea6..d12bf653e1 100644
--- a/ssl/ssltest.c
+++ b/ssl/ssltest.c
@@ -123,6 +123,7 @@
 #include <string.h>
 #include <time.h>
 
+#define USE_SOCKETS
 #include "e_os.h"
 
 #include <openssl/bio.h>