diff --git a/Source/Modules/ControllerModules/KeyHandler_Core.swift b/Source/Modules/ControllerModules/KeyHandler_Core.swift
index beb5564f..d52cb05d 100644
--- a/Source/Modules/ControllerModules/KeyHandler_Core.swift
+++ b/Source/Modules/ControllerModules/KeyHandler_Core.swift
@@ -121,7 +121,7 @@ public class KeyHandler {
     if mgrPrefs.isDebugModeEnabled {
       let result = compositor.dumpDOT
       let appSupportPath = FileManager.default.urls(for: .cachesDirectory, in: .userDomainMask)[0].path.appending(
-        "vChewing-visualization.dot")
+        "/vChewing-visualization.dot")
       do {
         try result.write(toFile: appSupportPath, atomically: true, encoding: .utf8)
       } catch {