diff --git a/contrib/unbound/config.h b/contrib/unbound/config.h
index 73c64a0a5de..a3ac0c4bdb6 100644
--- a/contrib/unbound/config.h
+++ b/contrib/unbound/config.h
@@ -664,6 +664,9 @@
 /* Define as the return type of signal handlers (`int' or `void'). */
 #define RETSIGTYPE void
 
+/* if REUSEPORT is enabled by default */
+#define REUSEPORT_DEFAULT 0
+
 /* default rootkey location */
 #define ROOT_ANCHOR_FILE "/var/unbound/root.key"
 
diff --git a/contrib/unbound/config.h.in b/contrib/unbound/config.h.in
index 7ffb3c989b1..2f98f193c06 100644
--- a/contrib/unbound/config.h.in
+++ b/contrib/unbound/config.h.in
@@ -663,6 +663,9 @@
 /* Define as the return type of signal handlers (`int' or `void'). */
 #undef RETSIGTYPE
 
+/* if REUSEPORT is enabled by default */
+#undef REUSEPORT_DEFAULT
+
 /* default rootkey location */
 #undef ROOT_ANCHOR_FILE
 
diff --git a/contrib/unbound/configure b/contrib/unbound/configure
index 4f134fca0bc..5c14d876760 100755
--- a/contrib/unbound/configure
+++ b/contrib/unbound/configure
@@ -15966,6 +15966,17 @@ fi
 done
 
 
+# check if we can use SO_REUSEPORT
+if echo "$host" | grep -i -e linux -e dragonfly >/dev/null; then
+
+$as_echo "#define REUSEPORT_DEFAULT 1" >>confdefs.h
+
+else
+
+$as_echo "#define REUSEPORT_DEFAULT 0" >>confdefs.h
+
+fi
+
 # set memory allocation checking if requested
 # Check whether --enable-alloc-checks was given.
 if test "${enable_alloc_checks+set}" = set; then :
diff --git a/contrib/unbound/configure.ac b/contrib/unbound/configure.ac
index 772a1417a98..48bdb8fab6e 100644
--- a/contrib/unbound/configure.ac
+++ b/contrib/unbound/configure.ac
@@ -461,6 +461,13 @@ ACX_CHECK_NONBLOCKING_BROKEN
 ACX_MKDIR_ONE_ARG
 AC_CHECK_FUNCS([strptime],[AC_CHECK_STRPTIME_WORKS],[AC_LIBOBJ([strptime])])
 
+# check if we can use SO_REUSEPORT
+if echo "$host" | grep -i -e linux -e dragonfly >/dev/null; then
+	AC_DEFINE(REUSEPORT_DEFAULT, 1, [if REUSEPORT is enabled by default])
+else
+	AC_DEFINE(REUSEPORT_DEFAULT, 0, [if REUSEPORT is enabled by default])
+fi
+
 # set memory allocation checking if requested
 AC_ARG_ENABLE(alloc-checks, AC_HELP_STRING([--enable-alloc-checks],
 	[ enable to memory allocation statistics, for debug purposes ]), 
diff --git a/contrib/unbound/util/config_file.c b/contrib/unbound/util/config_file.c
index 8ef61c8e21b..1a24ed5019c 100644
--- a/contrib/unbound/util/config_file.c
+++ b/contrib/unbound/util/config_file.c
@@ -177,7 +177,7 @@ config_create(void)
 	cfg->if_automatic = 0;
 	cfg->so_rcvbuf = 0;
 	cfg->so_sndbuf = 0;
-	cfg->so_reuseport = 1;
+	cfg->so_reuseport = REUSEPORT_DEFAULT;
 	cfg->ip_transparent = 0;
 	cfg->ip_freebind = 0;
 	cfg->num_ifs = 0;