diff --git a/include/ipc.h b/include/ipc.h
index 9063b9337..6063f69c5 100644
--- a/include/ipc.h
+++ b/include/ipc.h
@@ -16,6 +16,7 @@ enum ipc_command_type {
 	IPC_GET_BINDING_MODES = 8,
 	IPC_GET_CONFIG = 9,
 	IPC_SEND_TICK = 10,
+	IPC_SYNC = 11,
 
 	// sway-specific command types
 	IPC_GET_INPUTS = 100,
diff --git a/sway/ipc-server.c b/sway/ipc-server.c
index 69009f252..28546d41e 100644
--- a/sway/ipc-server.c
+++ b/sway/ipc-server.c
@@ -836,6 +836,14 @@ void ipc_client_handle_command(struct ipc_client *client) {
 		goto exit_cleanup;
     }
 
+	case IPC_SYNC:
+	{
+		// It was decided sway will not support this, just return success:false
+		const char msg[] = "{\"success\": false}";
+		ipc_send_reply(client, msg, strlen(msg));
+		goto exit_cleanup;
+	}
+
 	default:
 		wlr_log(WLR_INFO, "Unknown IPC command type %i", client->current_command);
 		goto exit_cleanup;