diff --git a/gsk4/Gir.toml b/gsk4/Gir.toml
index ba95fc4c25ee..e15c7d5dfbab 100644
--- a/gsk4/Gir.toml
+++ b/gsk4/Gir.toml
@@ -107,6 +107,9 @@ status = "generate"
     [[object.function]]
     name = "new"
     manual = true
+    [[object.function]]
+    name = "get_child"
+    manual = true # assert that idx < n_children
 
 [[object]]
 name = "Gsk.GLShader"
@@ -138,6 +141,9 @@ status = "generate"
     [[object.function]]
     name = "new"
     manual = true
+    [[object.function]]
+    name = "get_child"
+    manual = true # assert that idx < n_children
 
 [[object]]
 name = "Gsk.LinearGradientNode"
diff --git a/gsk4/src/auto/container_node.rs b/gsk4/src/auto/container_node.rs
index 0744765dcf04..57c91d4f3cc3 100644
--- a/gsk4/src/auto/container_node.rs
+++ b/gsk4/src/auto/container_node.rs
@@ -18,17 +18,6 @@ glib::wrapper! {
 }
 
 impl ContainerNode {
-    #[doc(alias = "gsk_container_node_get_child")]
-    #[doc(alias = "get_child")]
-    pub fn child(&self, idx: u32) -> Option<RenderNode> {
-        unsafe {
-            from_glib_none(ffi::gsk_container_node_get_child(
-                self.to_glib_none().0,
-                idx,
-            ))
-        }
-    }
-
     #[doc(alias = "gsk_container_node_get_n_children")]
     #[doc(alias = "get_n_children")]
     pub fn n_children(&self) -> u32 {
diff --git a/gsk4/src/auto/gl_shader_node.rs b/gsk4/src/auto/gl_shader_node.rs
index abce6dc40c33..600bbc2a2922 100644
--- a/gsk4/src/auto/gl_shader_node.rs
+++ b/gsk4/src/auto/gl_shader_node.rs
@@ -25,17 +25,6 @@ impl GLShaderNode {
         unsafe { from_glib_none(ffi::gsk_gl_shader_node_get_args(self.to_glib_none().0)) }
     }
 
-    #[doc(alias = "gsk_gl_shader_node_get_child")]
-    #[doc(alias = "get_child")]
-    pub fn child(&self, idx: u32) -> Option<RenderNode> {
-        unsafe {
-            from_glib_none(ffi::gsk_gl_shader_node_get_child(
-                self.to_glib_none().0,
-                idx,
-            ))
-        }
-    }
-
     #[doc(alias = "gsk_gl_shader_node_get_n_children")]
     #[doc(alias = "get_n_children")]
     pub fn n_children(&self) -> u32 {
diff --git a/gsk4/src/container_node.rs b/gsk4/src/container_node.rs
index 54107180c9b3..e87d838a5124 100644
--- a/gsk4/src/container_node.rs
+++ b/gsk4/src/container_node.rs
@@ -21,4 +21,16 @@ impl ContainerNode {
             ))
         }
     }
+
+    #[doc(alias = "gsk_container_node_get_child")]
+    #[doc(alias = "get_child")]
+    pub fn child(&self, idx: u32) -> Option<RenderNode> {
+        assert!(idx < self.n_children());
+        unsafe {
+            from_glib_none(ffi::gsk_container_node_get_child(
+                self.to_glib_none().0,
+                idx,
+            ))
+        }
+    }
 }
diff --git a/gsk4/src/gl_shader_node.rs b/gsk4/src/gl_shader_node.rs
index 6d5d3a4e2ce9..6961ff29967f 100644
--- a/gsk4/src/gl_shader_node.rs
+++ b/gsk4/src/gl_shader_node.rs
@@ -30,4 +30,16 @@ impl GLShaderNode {
             ))
         }
     }
+
+    #[doc(alias = "gsk_gl_shader_node_get_child")]
+    #[doc(alias = "get_child")]
+    pub fn child(&self, idx: u32) -> Option<RenderNode> {
+        assert!(idx < self.n_children());
+        unsafe {
+            from_glib_none(ffi::gsk_gl_shader_node_get_child(
+                self.to_glib_none().0,
+                idx,
+            ))
+        }
+    }
 }