diff --git a/.gitignore b/.gitignore
index be0d2845b6..a69afd7cc5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,3 +41,5 @@ CMakeLists.txt.user
 .idea/
 # Ignore Visual Studio Code's working dir
 /.vscode/
+# Ignore flatpak-builder's cache dir
+.flatpak-builder