diff --git a/main_game_lib/src/top_down/layout/map_maker.rs b/main_game_lib/src/top_down/layout/map_maker.rs
index ffdf62ba..f53e5a93 100644
--- a/main_game_lib/src/top_down/layout/map_maker.rs
+++ b/main_game_lib/src/top_down/layout/map_maker.rs
@@ -398,8 +398,16 @@ fn export_map<T: TopDownScene>(
 
     let dot_g = g.as_dotgraph(T::name());
     info!("Graphviz dot graph: \n{}", dot_g.as_dot());
-    let svg = dot_g.into_svg().unwrap();
-    fs::write(format!("{scene_path}/docs/tile-graph.svg"), svg).unwrap();
+
+    match dot_g.into_svg() {
+        Ok(svg) => {
+            fs::write(format!("{scene_path}/docs/tile-graph.svg"), svg)
+                .unwrap();
+        }
+        Err(e) => {
+            error!("Could not generate svg from dot graph: {e}");
+        }
+    }
 }
 
 impl<L: Eq> TileKind<L> {
diff --git a/wiki/src/SUMMARY.md b/wiki/src/SUMMARY.md
index 155d5b79..628dd7ba 100644
--- a/wiki/src/SUMMARY.md
+++ b/wiki/src/SUMMARY.md
@@ -11,3 +11,4 @@
 - [Devtools](devtools.md)
   - [Godot](devtools_godot.md)
   - [Dialog](devtools_dialog.md)
+  - [Map maker](devtools_map_maker.md)
diff --git a/wiki/src/devtools_map_maker.md b/wiki/src/devtools_map_maker.md
new file mode 100644
index 00000000..f09198f4
--- /dev/null
+++ b/wiki/src/devtools_map_maker.md
@@ -0,0 +1,5 @@
+TODO
+
+To store the edit, you can press the "Store button".
+Ideally, you would have [`graphviz`] installed.
+We use it to store an SVG file that shows connections between zones for debug purposes.