diff --git a/src/mkhelp.pl b/src/mkhelp.pl
index 1c0a867da..2e1e6985a 100644
--- a/src/mkhelp.pl
+++ b/src/mkhelp.pl
@@ -158,8 +158,6 @@ void hugehelp(void)
   z.zalloc = (alloc_func)Z_NULL;
   z.zfree = (free_func)Z_NULL;
   z.opaque = 0;
-  z.next_in = NULL;
-  z.avail_in = 0;
 
   if (inflateInit2(&z, -MAX_WBITS) != Z_OK)
     return;