diff --git a/docs/examples/http2-download.c b/docs/examples/http2-download.c
index a4099a8c1..3b7ca81d3 100644
--- a/docs/examples/http2-download.c
+++ b/docs/examples/http2-download.c
@@ -165,7 +165,7 @@ static void setup(CURL *hnd, int num)
   curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYPEER, 0L);
   curl_easy_setopt(hnd, CURLOPT_SSL_VERIFYHOST, 0L);
 
-#ifdef CURLPIPE_MULTIPLEX
+#if (CURLPIPE_MULTIPLEX > 0)
   /* wait for pipe connection to confirm */
   curl_easy_setopt(hnd, CURLOPT_PIPEWAIT, 1L);
 #endif