diff --git a/wlantest/rx_eapol.c b/wlantest/rx_eapol.c
index 6607aeec4..70ab2cb2a 100644
--- a/wlantest/rx_eapol.c
+++ b/wlantest/rx_eapol.c
@@ -248,14 +248,7 @@ static int try_pmk(struct wlantest *wt, struct wlantest_bss *bss,
 		sta->tptk_set = 1;
 		return 0;
 	}
-	add_note(wt, MSG_DEBUG, "Derived new PTK");
-	os_memcpy(&sta->ptk, &ptk, sizeof(ptk));
-	wpa_hexdump(MSG_DEBUG, "PTK:KCK", sta->ptk.kck, sta->ptk.kck_len);
-	wpa_hexdump(MSG_DEBUG, "PTK:KEK", sta->ptk.kek, sta->ptk.kek_len);
-	wpa_hexdump(MSG_DEBUG, "PTK:TK", sta->ptk.tk, sta->ptk.tk_len);
-	sta->ptk_set = 1;
-	os_memset(sta->rsc_tods, 0, sizeof(sta->rsc_tods));
-	os_memset(sta->rsc_fromds, 0, sizeof(sta->rsc_fromds));
+	sta_new_ptk(wt, sta, &ptk);
 	return 0;
 }
 
diff --git a/wlantest/rx_mgmt.c b/wlantest/rx_mgmt.c
index c649d4de5..2a32510f1 100644
--- a/wlantest/rx_mgmt.c
+++ b/wlantest/rx_mgmt.c
@@ -298,11 +298,7 @@ static void process_ft_auth(struct wlantest *wt, struct wlantest_bss *bss,
 			      sta->pairwise_cipher, 0) < 0)
 		return;
 
-	add_note(wt, MSG_DEBUG, "Derived new PTK");
-	os_memcpy(&sta->ptk, &ptk, sizeof(ptk));
-	sta->ptk_set = 1;
-	os_memset(sta->rsc_tods, 0, sizeof(sta->rsc_tods));
-	os_memset(sta->rsc_fromds, 0, sizeof(sta->rsc_fromds));
+	sta_new_ptk(wt, sta, &ptk);
 }
 
 
@@ -1823,11 +1819,7 @@ static void rx_mgmt_action_ft_response(struct wlantest *wt,
 			      0) < 0)
 		return;
 
-	add_note(wt, MSG_DEBUG, "Derived new PTK");
-	os_memcpy(&new_sta->ptk, &ptk, sizeof(ptk));
-	new_sta->ptk_set = 1;
-	os_memset(new_sta->rsc_tods, 0, sizeof(new_sta->rsc_tods));
-	os_memset(new_sta->rsc_fromds, 0, sizeof(new_sta->rsc_fromds));
+	sta_new_ptk(wt, new_sta, &ptk);
 	os_memcpy(new_sta->snonce, parse.fte_snonce, WPA_NONCE_LEN);
 	os_memcpy(new_sta->anonce, parse.fte_anonce, WPA_NONCE_LEN);
 }
diff --git a/wlantest/sta.c b/wlantest/sta.c
index c390e0022..571ca1284 100644
--- a/wlantest/sta.c
+++ b/wlantest/sta.c
@@ -272,3 +272,62 @@ skip_rsn_wpa:
 		   sta->rsn_capab & WPA_CAPABILITY_EXT_KEY_ID_FOR_UNICAST ?
 		   "ExtKeyID " : "");
 }
+
+
+static void sta_copy_ptk(struct wlantest_sta *sta, struct wpa_ptk *ptk)
+{
+	os_memcpy(&sta->ptk, ptk, sizeof(*ptk));
+	sta->ptk_set = 1;
+	os_memset(sta->rsc_tods, 0, sizeof(sta->rsc_tods));
+	os_memset(sta->rsc_fromds, 0, sizeof(sta->rsc_fromds));
+}
+
+
+void sta_new_ptk(struct wlantest *wt, struct wlantest_sta *sta,
+		 struct wpa_ptk *ptk)
+{
+	struct wlantest_bss *bss;
+	struct wlantest_sta *osta;
+
+	add_note(wt, MSG_DEBUG, "Derived new PTK");
+	sta_copy_ptk(sta, ptk);
+	wpa_hexdump(MSG_DEBUG, "PTK:KCK", sta->ptk.kck, sta->ptk.kck_len);
+	wpa_hexdump(MSG_DEBUG, "PTK:KEK", sta->ptk.kek, sta->ptk.kek_len);
+	wpa_hexdump(MSG_DEBUG, "PTK:TK", sta->ptk.tk, sta->ptk.tk_len);
+
+	dl_list_for_each(bss, &wt->bss, struct wlantest_bss, list) {
+		dl_list_for_each(osta, &bss->sta, struct wlantest_sta, list) {
+			bool match = false;
+			int link_id;
+
+			if (osta == sta)
+				continue;
+			if (os_memcmp(sta->addr, osta->addr, ETH_ALEN) == 0)
+				match = true;
+			for (link_id = 0; !match && link_id < MAX_NUM_MLO_LINKS;
+			     link_id++) {
+				if (os_memcmp(osta->link_addr[link_id],
+					      sta->addr, ETH_ALEN) == 0)
+					match = true;
+			}
+
+			if (!match)
+				continue;
+			wpa_printf(MSG_DEBUG,
+				   "Add PTK to another MLO STA entry " MACSTR
+				   " (MLD " MACSTR " --> " MACSTR ") in BSS "
+				   MACSTR " (MLD " MACSTR " --> " MACSTR ")",
+				   MAC2STR(osta->addr),
+				   MAC2STR(osta->mld_mac_addr),
+				   MAC2STR(sta->mld_mac_addr),
+				   MAC2STR(bss->bssid),
+				   MAC2STR(bss->mld_mac_addr),
+				   MAC2STR(sta->bss->mld_mac_addr));
+			sta_copy_ptk(osta, ptk);
+			os_memcpy(osta->mld_mac_addr, sta->mld_mac_addr,
+				  ETH_ALEN);
+			os_memcpy(osta->bss->mld_mac_addr,
+				  sta->bss->mld_mac_addr, ETH_ALEN);
+		}
+	}
+}
diff --git a/wlantest/wlantest.h b/wlantest/wlantest.h
index 6627701f4..20f411783 100644
--- a/wlantest/wlantest.h
+++ b/wlantest/wlantest.h
@@ -306,6 +306,8 @@ struct wlantest_sta * sta_get(struct wlantest_bss *bss, const u8 *addr);
 void sta_deinit(struct wlantest_sta *sta);
 void sta_update_assoc(struct wlantest_sta *sta,
 		      struct ieee802_11_elems *elems);
+void sta_new_ptk(struct wlantest *wt, struct wlantest_sta *sta,
+		 struct wpa_ptk *ptk);
 
 u8 * ccmp_decrypt(const u8 *tk, const struct ieee80211_hdr *hdr,
 		  const u8 *a1, const u8 *a2, const u8 *data, size_t data_len,