diff --git a/configure.ac b/configure.ac
index e0057d974f..5bac4f0c63 100644
--- a/configure.ac
+++ b/configure.ac
@@ -506,10 +506,7 @@ AS_CASE(["$target_os"],
     ])
     rb_cv_binary_elf=no
     : ${enable_shared=yes}
-],
-[darwin*], [
-    : ${enable_shared=yes}
-],
+    ],
 [hiuxmpp*], [AC_DEFINE(__HIUX_MPP__)])    # by TOYODA Eizi <toyoda@npd.kishou.go.jp>