--- src/tls/tls_client.c.orig	2016-03-16 09:45:17.686921418 +0100
+++ src/tls/tls_client.c	2016-03-16 09:46:24.431617807 +0100
@@ -369,6 +369,12 @@
     SSL_CTX_set_security_level(client_ctx, 0);
 #endif
 
+    /* Keep memory usage as low as possible */
+
+#ifdef SSL_MODE_RELEASE_BUFFERS
+    SSL_CTX_set_mode(client_ctx, SSL_MODE_RELEASE_BUFFERS);
+#endif
+
     /*
      * See the verify callback in tls_verify.c
      */
--- src/tls/tls_server.c.orig	2016-03-16 09:45:39.487150299 +0100
+++ src/tls/tls_server.c	2016-03-16 09:51:32.230678857 +0100
@@ -451,6 +451,12 @@
     SSL_CTX_set_security_level(server_ctx, 0);
 #endif
 
+    /* Keep memory usage as low as possible */
+
+#ifdef SSL_MODE_RELEASE_BUFFERS
+    SSL_CTX_set_mode(server_ctx, SSL_MODE_RELEASE_BUFFERS);
+#endif
+
     /*
      * See the verify callback in tls_verify.c
      */