diff --git a/src/libsystemd-network/sd-ipv4acd.c b/src/libsystemd-network/sd-ipv4acd.c
index 1bf0fb18f3..9426b65324 100644
--- a/src/libsystemd-network/sd-ipv4acd.c
+++ b/src/libsystemd-network/sd-ipv4acd.c
@@ -21,6 +21,7 @@
 #include "log-link.h"
 #include "random-util.h"
 #include "siphash24.h"
+#include "string-table.h"
 #include "string-util.h"
 #include "time-util.h"
 
@@ -79,10 +80,25 @@ struct sd_ipv4acd {
 #define log_ipv4acd(acd, fmt, ...)                      \
         log_ipv4acd_errno(acd, 0, fmt, ##__VA_ARGS__)
 
+static const char * const ipv4acd_state_table[_IPV4ACD_STATE_MAX] = {
+        [IPV4ACD_STATE_INIT]             = "init",
+        [IPV4ACD_STATE_STARTED]          = "started",
+        [IPV4ACD_STATE_WAITING_PROBE]    = "waiting-probe",
+        [IPV4ACD_STATE_PROBING]          = "probing",
+        [IPV4ACD_STATE_WAITING_ANNOUNCE] = "waiting-announce",
+        [IPV4ACD_STATE_ANNOUNCING]       = "announcing",
+        [IPV4ACD_STATE_RUNNING]          = "running",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP_TO_STRING(ipv4acd_state, IPv4ACDState);
+
 static void ipv4acd_set_state(sd_ipv4acd *acd, IPv4ACDState st, bool reset_counter) {
         assert(acd);
         assert(st < _IPV4ACD_STATE_MAX);
 
+        if (st != acd->state)
+                log_ipv4acd(acd, "%s -> %s", ipv4acd_state_to_string(acd->state), ipv4acd_state_to_string(st));
+
         if (st == acd->state && !reset_counter)
                 acd->n_iteration++;
         else {