diff --git a/doc/1-intro/troubleshooting.md b/doc/1-intro/troubleshooting.md
index 69a8b180c..505e5a961 100644
--- a/doc/1-intro/troubleshooting.md
+++ b/doc/1-intro/troubleshooting.md
@@ -9,6 +9,7 @@ Furnace configuration file locations:
 - **Windows**: `%USERPROFILE%\AppData\Roaming\furnace`
 - **macOS**: `~/Library/Application Support/Furnace`
 - **Linux/other**: `~/.config/furnace`
+- **Linux (Flatpak)**: `~/.var/app/org.tildearrow.furnace`
 
 what the files contain: