diff --git a/contrib/unzip/ioapi.h b/contrib/unzip/ioapi.h
index 416909fab..0e49543e5 100644
--- a/contrib/unzip/ioapi.h
+++ b/contrib/unzip/ioapi.h
@@ -21,25 +21,24 @@
 #include "zlib.h"
 
 #if defined(USE_FILE32API)
-#  define fopen64 fopen
-#  define ftello64 ftell
-#  define fseeko64 fseek
+#   define fopen64 fopen
+#   define ftello64 ftell
+#   define fseeko64 fseek
 #else
-#  if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__OpenBSD__) || defined(__APPLE__) || defined(__ANDROID__)
-#    define fopen64 fopen
-#    define ftello64 ftello
-#    define fseeko64 fseeko
-#  endif
-#  ifdef _MSC_VER
-#    define fopen64 fopen
-#    if (_MSC_VER >= 1400) && (!(defined(NO_MSCVER_FILE64_FUNC)))
-#      define ftello64 _ftelli64
-#      define fseeko64 _fseeki64
-#    else /* old MSC */
-#      define ftello64 ftell
-#      define fseeko64 fseek
-#    endif
-#  endif
+#if defined(_MSC_VER)
+#   define fopen64 fopen
+#   if (_MSC_VER >= 1400) && (!(defined(NO_MSCVER_FILE64_FUNC)))
+#       define ftello64 _ftelli64
+#       define fseeko64 _fseeki64
+#   else /* old MSC */
+#       define ftello64 ftell
+#       define fseeko64 fseek
+#   endif
+#else
+#   define fopen64 fopen
+#   define ftello64 ftello
+#   define fseeko64 fseeko
+#endif
 #endif
 
 #ifdef __cplusplus