diff --git a/configure b/configure
index 3f38929d8..6514ff54f 100755
--- a/configure
+++ b/configure
@@ -19762,7 +19762,7 @@ done
 
 
 # check if setreuid en setregid fail, on MacOSX10.4(darwin8).
-if echo $build_os | grep darwin8 > /dev/null; then
+if echo $target_os | grep darwin8 > /dev/null; then
 
 $as_echo "#define DARWIN_BROKEN_SETREUID 1" >>confdefs.h
 
diff --git a/configure.ac b/configure.ac
index b4c484ec9..76f801948 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1324,7 +1324,7 @@ AC_CHECK_FUNCS([setresuid],,[AC_CHECK_FUNCS([setreuid])])
 AC_CHECK_FUNCS([setresgid],,[AC_CHECK_FUNCS([setregid])])
 
 # check if setreuid en setregid fail, on MacOSX10.4(darwin8).
-if echo $build_os | grep darwin8 > /dev/null; then
+if echo $target_os | grep darwin8 > /dev/null; then
 	AC_DEFINE(DARWIN_BROKEN_SETREUID, 1, [Define this if on macOSX10.4-darwin8 and setreuid and setregid do not work])
 fi
 AC_CHECK_DECLS([inet_pton,inet_ntop], [], [], [
diff --git a/doc/Changelog b/doc/Changelog
index f7ce2a1e6..e7c1d662d 100644
--- a/doc/Changelog
+++ b/doc/Changelog
@@ -1,3 +1,6 @@
+6 June 2018: Wouter
+	- Patch to fix openwrt for mac os build darwin detection in configure.
+
 5 June 2018: Wouter
 	- Fix crash if ratelimit taken into use with unbound-control
 	  instead of with unbound.conf.