diff --git a/os/wireless/default.nix b/os/wireless/default.nix
index 0bf1949..b3a7f75 100644
--- a/os/wireless/default.nix
+++ b/os/wireless/default.nix
@@ -53,24 +53,38 @@ in
     })
   ];
   # wireless support via wpa_supplicant
-  networking.wireless = {
-    enable = true;
-    extraConfig = ''
-      country=NL
+  networking = {
+    # Tell the time synchronisation service when we got/lost the connection
+    dhcpcd.runHook = ''
+      if $if_up; then
+          ${config.services.chrony.package}/bin/chronyc online
+      elif $if_down; then
+          ${config.services.chrony.package}/bin/chronyc offline
+      fi
     '';
-    # Public wireless networks
-    networks = lib.genAttrs [
-      "EurostarTrainsWiFi"
-      "_SNCF gare-gratuit"
-      "_SNCF_WIFI_INOUI"
-      "Wifi in de trein"
-      "WiFi in de trein"
-      "_WIFI_LYRIA"
-      "WIFIonICE"
-    ] (ssid: { });
-    userControlled.enable = true; # Allow some control with wpa_cli
+
+    wireless = {
+      enable = true;
+      extraConfig = ''
+        country=NL
+      '';
+      # Public wireless networks
+      networks = lib.genAttrs [
+        "EurostarTrainsWiFi"
+        "_SNCF gare-gratuit"
+        "_SNCF_WIFI_INOUI"
+        "Wifi in de trein"
+        "WiFi in de trein"
+        "_WIFI_LYRIA"
+        "WIFIonICE"
+      ] (ssid: { });
+      userControlled.enable = true; # Allow some control with wpa_cli
+    };
   };
+
+  # Wait until there's a connection to fetch time
   services.chrony.serverOption = "offline";
+
   systemd.services.wifi_apply = {
     after = [ "wpa_supplicant.service" ];
     wantedBy = [ "wpa_supplicant.service" ];