1 files changed, 4 insertions, 8 deletions

diff --git a/zutil.h b/zutil.h
index b21a19c..850f1ec 100644
--- a/zutil.h
+++ b/zutil.h
@@ -154,20 +154,16 @@ extern const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
   #pragma warn -8066
 #endif
 
-#if _LARGEFILE64_SOURCE == 1 && _LFS64_LARGEFILE == 1
+#if _LARGEFILE64_SOURCE && _LFS64_LARGEFILE
 #  define z_off64_t off64_t
 #else
 #  define z_off64_t z_off_t
 #endif
 
 /* provide prototypes for these when building zlib without LFS */
-#if _LARGEFILE64_SOURCE != 1 || _LFS64_LARGEFILE != 1
-    ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
-    ZEXTERN off_t ZEXPORT gzseek64 OF((gzFile, off_t, int));
-    ZEXTERN off_t ZEXPORT gztell64 OF((gzFile));
-    ZEXTERN off_t ZEXPORT gzoffset64 OF((gzFile));
-    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, off_t));
-    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, off_t));
+#if _LARGEFILE64_SOURCE+0 != 1 || _LFS64_LARGEFILE+0 != 1
+    ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
+    ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
 #endif
 
         /* common defaults */