diff --git a/lib/http2.c b/lib/http2.c
index 261e7f98d..e76200720 100644
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -42,7 +42,7 @@
 
 #define MIN(x,y) ((x)<(y)?(x):(y))
 
-#if (NGHTTP2_VERSION_NUM < 0x000600)
+#if (NGHTTP2_VERSION_NUM < 0x010000)
 #error too old nghttp2 version, upgrade!
 #endif