diff --git a/README.md b/README.md
index 19c2bccd..9a607e55 100644
--- a/README.md
+++ b/README.md
@@ -36,8 +36,8 @@
     * [Supported filters](#supported-filters)
     * [Examples for filters](#examples-for-filters)
     * [Built-in filters](#built-in-filters)
-    * [Changing the 3D model, simple mechanism](#changing-the-3d-model,-simple-mechanism)
-    * [Changing the 3D model, complex mechanism](#changing-the-3d-model,--mechanism)
+    * [Changing the 3D model, simple mechanism](#changing-the-3d-model-simple-mechanism)
+    * [Changing the 3D model, complex mechanism](#changing-the-3d-model-complex-mechanism)
     * [DNF and DNC internal keys](#dnf-and-dnc-internal-keys)
   * [The *outputs* section](#the-outputs-section)
     * [Specifying the layers](#specifying-the-layers)
diff --git a/docs/README.in b/docs/README.in
index 00cc90a9..85a35a1a 100644
--- a/docs/README.in
+++ b/docs/README.in
@@ -36,8 +36,8 @@
     * [Supported filters](#supported-filters)
     * [Examples for filters](#examples-for-filters)
     * [Built-in filters](#built-in-filters)
-    * [Changing the 3D model, simple mechanism](#changing-the-3d-model,-simple-mechanism)
-    * [Changing the 3D model, complex mechanism](#changing-the-3d-model,--mechanism)
+    * [Changing the 3D model, simple mechanism](#changing-the-3d-model-simple-mechanism)
+    * [Changing the 3D model, complex mechanism](#changing-the-3d-model-complex-mechanism)
     * [DNF and DNC internal keys](#dnf-and-dnc-internal-keys)
   * [The *outputs* section](#the-outputs-section)
     * [Specifying the layers](#specifying-the-layers)