diff --git a/acconfig.h b/acconfig.h
index 7b87198d04..6cc24a4b3b 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -17,9 +17,6 @@
  ***/
 @TOP@
 
-/** define if sysctlbyname() is available */
-#undef HAVE_SYSCTLBYNAME
-
 /** define if catgets() is available */
 #undef HAVE_CATGETS
 
diff --git a/config.h.in b/config.h.in
index eeeea85bc6..d0a1eda1bd 100644
--- a/config.h.in
+++ b/config.h.in
@@ -17,9 +17,6 @@
  *** it does not get installed.
  ***/
 
-/** define if sysctlbyname() is available */
-#undef HAVE_SYSCTLBYNAME
-
 /** define if catgets() is available */
 #undef HAVE_CATGETS
 
@@ -410,6 +407,9 @@
 /* Define to 1 if you have the `sysconf' function. */
 #undef HAVE_SYSCONF
 
+/* Define to 1 if you have the `sysctlbyname' function. */
+#undef HAVE_SYSCTLBYNAME
+
 /* Define to 1 if you have the <sys/capability.h> header file. */
 #undef HAVE_SYS_CAPABILITY_H
 
diff --git a/configure b/configure
index 293ecfe419..8d87d716ee 100755
--- a/configure
+++ b/configure
@@ -13573,12 +13573,6 @@ if test $ac_cv_c_volatile = no; then
 
 $as_echo "#define volatile /**/" >>confdefs.h
 
-fi
-
-ac_fn_c_check_func "$LINENO" "sysctlbyname" "ac_cv_func_sysctlbyname"
-if test "x$ac_cv_func_sysctlbyname" = xyes; then :
-  $as_echo "#define HAVE_SYSCTLBYNAME 1" >>confdefs.h
-
 fi
 
 
@@ -13624,6 +13618,18 @@ $as_echo "#define FLEXIBLE_ARRAY_MEMBER /**/" >>confdefs.h
   fi
 
 
+for ac_func in sysctlbyname
+do :
+  ac_fn_c_check_func "$LINENO" "sysctlbyname" "ac_cv_func_sysctlbyname"
+if test "x$ac_cv_func_sysctlbyname" = xyes; then :
+  cat >>confdefs.h <<_ACEOF
+#define HAVE_SYSCTLBYNAME 1
+_ACEOF
+
+fi
+done
+
+
 #
 # Check for the existence of mmap to enable the fast format zones
 #
diff --git a/configure.in b/configure.in
index d4fe8ebc1d..9a673fe073 100644
--- a/configure.in
+++ b/configure.in
@@ -458,9 +458,10 @@ AC_CHECK_HEADERS([threads.h],
 AC_C_CONST
 AC_C_INLINE
 AC_C_VOLATILE
-AC_CHECK_FUNC(sysctlbyname, AC_DEFINE(HAVE_SYSCTLBYNAME))
 AC_C_FLEXIBLE_ARRAY_MEMBER
 
+AC_CHECK_FUNCS([sysctlbyname])
+
 #
 # Check for the existence of mmap to enable the fast format zones
 #