diff --git a/apps/opencs/editor.cpp b/apps/opencs/editor.cpp
index da2e2727e1..7e9abcf4da 100644
--- a/apps/opencs/editor.cpp
+++ b/apps/opencs/editor.cpp
@@ -44,7 +44,7 @@ CS::Editor::Editor(int argc, char** argv)
     : mConfigVariables(readConfiguration())
     , mSettingsState(mCfgMgr)
     , mDocumentManager(mCfgMgr)
-    , mPid(std::filesystem::temp_directory_path() /= "openmw-cs.pid")
+    , mPid(std::filesystem::temp_directory_path() / "openmw-cs.pid")
     , mLockFile(QFileInfo(mPid.c_str()).absoluteFilePath() + ".lock")
     , mMerge(mDocumentManager)
     , mIpcServerName("org.openmw.OpenCS")