diff --git a/glib/glib-private.h b/glib/glib-private.h
index dae496bfd..e96a73fb6 100644
--- a/glib/glib-private.h
+++ b/glib/glib-private.h
@@ -63,6 +63,18 @@ void __lsan_ignore_object (const void *p) __attribute__ ((weak));
 
 #endif
 
+/**
+ * G_CONTAINER_OF:
+ * @ptr: a pointer to a member @field of type @type.
+ * @type: the type of the container in which @field is embedded.
+ * @field: the name of the field in @type.
+ *
+ * Casts away constness of @ptr.
+ *
+ * Returns: a pointer to the container, so that "&(@container)->field == (@ptr)" holds.
+ */
+#define G_CONTAINER_OF(ptr, type, field) ((type *) G_STRUCT_MEMBER_P (ptr, -G_STRUCT_OFFSET (type, field)))
+
 /*
  * g_leak_sanitizer_is_supported:
  *