1 files changed, 6 insertions, 0 deletions

diff --git a/zconf.h b/zconf.h
index df7ff61..fd10c6a 100644
--- a/zconf.h
+++ b/zconf.h
@@ -214,6 +214,12 @@
 #  endif
 #endif
 
+#if defined(ZLIB_CONST) && !defined(z_const)
+#  define z_const const
+#else
+#  define z_const
+#endif
+
 /* Some Mac compilers merge all .h files incorrectly: */
 #if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
 #  define NO_DUMMY_DECL