diff --git a/modules/beast_core/memory/beast_SharedObject.h b/modules/beast_core/memory/beast_SharedObject.h
index e73a59be7..2b5e46296 100644
--- a/modules/beast_core/memory/beast_SharedObject.h
+++ b/modules/beast_core/memory/beast_SharedObject.h
@@ -59,7 +59,7 @@
 
     @see SharedObjectPtr, SharedObjectArray, SingleThreadedSharedObject
 */
-class BEAST_API SharedObject : Uncopyable
+class BEAST_API SharedObject : public Uncopyable
 {
 public:
     //==============================================================================