diff --git a/config.h.cmake b/config.h.cmake
index d3c4f0c7d..fe14d99ea 100644
--- a/config.h.cmake
+++ b/config.h.cmake
@@ -1155,11 +1155,7 @@ __END_DECLS
 
 
 
-/*
- * On HP-UX, the declaration of vsnprintf() is needed every time !
- */
-
-#if !defined(HAVE_VSNPRINTF) || defined(hpux)
+#if !defined(HAVE_VSNPRINTF_PROTO)
 #if __STDC__
 #include <stdarg.h>
 #include <stdlib.h>