diff --git a/src/app/clusters/general-diagnostics-server/general-diagnostics-server.cpp b/src/app/clusters/general-diagnostics-server/general-diagnostics-server.cpp
index 4e6cced6dd2e21..0c5cf641268ad9 100644
--- a/src/app/clusters/general-diagnostics-server/general-diagnostics-server.cpp
+++ b/src/app/clusters/general-diagnostics-server/general-diagnostics-server.cpp
@@ -20,7 +20,9 @@
 #include <zap-generated/gen_config.h>
 
 #ifdef ZCL_USING_TIME_SYNCHRONIZATION_CLUSTER_SERVER
-#include "app/clusters/time-synchronization-server/time-synchronization-server.h"
+// Need the `nogncheck` because it's inter-cluster dependency and this
+// breaks GN deps checks since that doesn't know how to deal with #ifdef'd includes :(.
+#include "app/clusters/time-synchronization-server/time-synchronization-server.h" // nogncheck
 #endif                                                                            // ZCL_USING_TIME_SYNCHRONIZATION_CLUSTER_SERVER
 
 #include "app/server/Server.h"