diff --git a/UPGRADE-3.0.md b/UPGRADE-3.0.md
index a115df128e6bb..e0b1c693600fb 100644
--- a/UPGRADE-3.0.md
+++ b/UPGRADE-3.0.md
@@ -10,7 +10,7 @@ UPGRADE FROM 2.x to 3.0
    | -------- | ---
    | `registerNamespaces()` | `addPrefixes()`
    | `registerPrefixes()` | `addPrefixes()`
-   | `registerNamespaces()` | `addPrefix()`
+   | `registerNamespace()` | `addPrefix()`
    | `registerPrefix()` | `addPrefix()`
    | `getNamespaces()` | `getPrefixes()`
    | `getNamespaceFallbacks()` | `getFallbackDirs()`