diff --git a/lib/http2.c b/lib/http2.c
index 8882f1f803..21be17ba7b 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -23,6 +23,9 @@
 #include "curl_setup.h"
 
 #ifdef USE_NGHTTP2
+#define _MPRINTF_REPLACE
+#include <curl/mprintf.h>
+
 #include <nghttp2/nghttp2.h>
 #include "http2.h"