--- a/src/wg-quick/linux.bash
+++ b/src/wg-quick/linux.bash
@@ -325,9 +325,13 @@
 
 cmd_up() {
 	local i
-	[[ -z $(ip link show dev "$INTERFACE" 2>/dev/null) ]] || die "\`$INTERFACE' already exists"
+	# Allow adopting an interface already created by the amneziawg-go userspace daemon.
+	if [[ -n $(ip link show dev "$INTERFACE" 2>/dev/null) ]]; then
+		[[ -S /run/amneziawg/$INTERFACE.sock ]] || die "\`$INTERFACE' already exists"
+		DAEMON_MANAGED=1
+	fi
 	trap 'del_if; exit' INT TERM EXIT
-	add_if
+	[[ -n $DAEMON_MANAGED ]] || add_if
 	execute_hooks "${PRE_UP[@]}"
 	set_config
 	for i in "${ADDRESSES[@]}"; do