diff --git a/dlls/winhttp/winhttp_private.h b/dlls/winhttp/winhttp_private.h
index 549d9cd2a04..b971e6690ee 100644
--- a/dlls/winhttp/winhttp_private.h
+++ b/dlls/winhttp/winhttp_private.h
@@ -26,6 +26,9 @@
 #include "wine/list.h"
 #include "wine/unicode.h"
 
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
 #ifdef HAVE_NETDB_H
 # include <netdb.h>
 #endif