diff --git a/src/array.c b/src/array.c
index c83008cbb..a4d6cece2 100644
--- a/src/array.c
+++ b/src/array.c
@@ -18,12 +18,8 @@
 #define ARY_SHRINK_RATIO  5 /* must be larger than 2 */
 #define ARY_C_MAX_SIZE (SIZE_MAX / sizeof(mrb_value))
 #ifndef MRB_ARY_LENGTH_MAX
-#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__)
-#define MRB_ARY_LENGTH_MAX 0
-#else
 #define MRB_ARY_LENGTH_MAX 131072
 #endif
-#endif
 #define ARY_MAX_SIZE ((mrb_int)((ARY_C_MAX_SIZE < (size_t)MRB_INT_MAX) ? ARY_C_MAX_SIZE : MRB_INT_MAX-1))
 
 static void