1 files changed, 2 insertions, 2 deletions

diff --git a/zconf.h.in b/zconf.h.in
index d6c159a..bc3ef07 100644
--- a/zconf.h.in
+++ b/zconf.h.in
@@ -436,11 +436,11 @@ typedef uLong FAR uLongf;
    typedef unsigned long z_crc_t;
 #endif
 
-#ifdef HAVE_UNISTD_H    /* may be set to #if 1 by ./configure */
+#if HAVE_UNISTD_H-0     /* may be set to #if 1 by ./configure */
 #  define Z_HAVE_UNISTD_H
 #endif
 
-#ifdef HAVE_STDARG_H    /* may be set to #if 1 by ./configure */
+#if HAVE_STDARG_H-0     /* may be set to #if 1 by ./configure */
 #  define Z_HAVE_STDARG_H
 #endif