diff --git a/src/libsystemd-network/sd-ipv4acd.c b/src/libsystemd-network/sd-ipv4acd.c
index 8303e7fb34..1c5eae3cff 100644
--- a/src/libsystemd-network/sd-ipv4acd.c
+++ b/src/libsystemd-network/sd-ipv4acd.c
@@ -329,7 +329,7 @@ static bool ipv4acd_arp_conflict(sd_ipv4acd *acd, const struct ether_arp *arp, b
         if (acd->check_mac_callback &&
             acd->check_mac_callback(acd, (const struct ether_addr*) arp->arp_sha, acd->check_mac_userdata) > 0)
                 /* sender hardware is one of the host's interfaces, ignoring. */
-                return true;
+                return false;
 
         return true; /* conflict! */
 }