diff -ur nginx-1.19.6/src/event/ngx_event_openssl.c nginx/src/event/ngx_event_openssl.c
--- nginx-1.19.6/src/event/ngx_event_openssl.c	2020-12-15 15:41:39.000000000 +0100
+++ nginx/src/event/ngx_event_openssl.c	2021-01-13 15:05:09.517028695 +0100
@@ -165,6 +165,11 @@
 
 #endif
 
+#ifdef WOLFSSL_NGINX
+    /* Turn on internal wolfssl debugging to stdout */
+    wolfSSL_Debugging_ON();
+#endif
+
 #ifndef SSL_OP_NO_COMPRESSION
     {
     /*