diff --git a/Libraries/LibGC/RootVector.h b/Libraries/LibGC/RootVector.h
index eaf698038b2..969ce1e7fe6 100644
--- a/Libraries/LibGC/RootVector.h
+++ b/Libraries/LibGC/RootVector.h
@@ -96,4 +96,13 @@ public:
     }
 };
 
+template<typename T>
+RootVector(Heap&, ReadonlySpan<T> const&) -> RootVector<T>;
+
+template<typename T>
+RootVector(Heap&, Span<T> const&) -> RootVector<T>;
+
+template<typename T>
+RootVector(Heap&, Vector<T> const&) -> RootVector<T>;
+
 }