diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 54f46f899b..c99b6f53d5 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -244,7 +244,7 @@
 #  include "setup-win32.h"
 #endif
 
-#include <curl/curl.h>
+#include <curl/system.h>
 
 /*
  * Use getaddrinfo to resolve the IPv4 address literal. If the current network