diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index e9b1024..15245e4 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -31,7 +31,11 @@
  *  http://www.ietf.org/rfc/rfc4346.txt
  */
 
+#if !defined(POLARSSL_CONFIG_FILE)
 #include "polarssl/config.h"
+#else
+#include POLARSSL_CONFIG_FILE
+#endif
 
 #if defined(POLARSSL_SSL_TLS_C)