--- contrib/mod_proxy/lib/proxy/tls.c
+++ contrib/mod_proxy/lib/proxy/tls.c
@@ -4532,7 +4532,7 @@
     ca_file = c->argv[0];
 
   } else {
-    ca_file = PR_CONFIG_DIR "/cacerts.pem";
+    ca_file = PR_CONFIG_DIR "/pki/tls/cert.pem";
     if (!file_exists2(p, ca_file)) {
       pr_trace_msg(trace_channel, 9,
         "warning: no default ProxyTLSCACertificateFile found at '%s'", ca_file);