diff --git a/src/apps/deskflow-gui/MainWindow.cpp b/src/apps/deskflow-gui/MainWindow.cpp
index 4c9f38cae..46da1675a 100644
--- a/src/apps/deskflow-gui/MainWindow.cpp
+++ b/src/apps/deskflow-gui/MainWindow.cpp
@@ -17,9 +17,9 @@
 #include "base/String.h"
 #include "common/Settings.h"
 #include "gui/Constants.h"
+#include "gui/Diagnostic.h"
 #include "gui/Logger.h"
 #include "gui/core/CoreProcess.h"
-#include "gui/diagnostic.h"
 #include "gui/ipc/DaemonIpcClient.h"
 #include "gui/messages.h"
 #include "gui/string_utils.h"
diff --git a/src/apps/deskflow-gui/main.cpp b/src/apps/deskflow-gui/main.cpp
index d65801824..77b8b5cef 100644
--- a/src/apps/deskflow-gui/main.cpp
+++ b/src/apps/deskflow-gui/main.cpp
@@ -9,8 +9,8 @@
 #include "MainWindow.h"
 #include "common/constants.h"
 #include "gui/Constants.h"
+#include "gui/Diagnostic.h"
 #include "gui/Logger.h"
-#include "gui/diagnostic.h"
 #include "gui/dotenv.h"
 #include "gui/messages.h"
 #include "gui/string_utils.h"
diff --git a/src/lib/gui/CMakeLists.txt b/src/lib/gui/CMakeLists.txt
index f03e26a81..45bf279d7 100644
--- a/src/lib/gui/CMakeLists.txt
+++ b/src/lib/gui/CMakeLists.txt
@@ -16,8 +16,8 @@ endif()
 add_library(${target} STATIC
   ${platform_sources}
   Constants.h
-  diagnostic.cpp
-  diagnostic.h
+  Diagnostic.cpp
+  Diagnostic.h
   dotenv.cpp
   dotenv.h
   env_vars.h
diff --git a/src/lib/gui/diagnostic.cpp b/src/lib/gui/Diagnostic.cpp
similarity index 98%
rename from src/lib/gui/diagnostic.cpp
rename to src/lib/gui/Diagnostic.cpp
index 242734b91..9162b2f07 100644
--- a/src/lib/gui/diagnostic.cpp
+++ b/src/lib/gui/Diagnostic.cpp
@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: GPL-2.0-only WITH LicenseRef-OpenSSL-Exception
  */
 
-#include "diagnostic.h"
+#include "Diagnostic.h"
 
 #include "common/Settings.h"
 
diff --git a/src/lib/gui/diagnostic.h b/src/lib/gui/Diagnostic.h
similarity index 100%
rename from src/lib/gui/diagnostic.h
rename to src/lib/gui/Diagnostic.h