diff --git a/src/hotspot/share/gc/shared/space.hpp b/src/hotspot/share/gc/shared/space.hpp
index 6b8279ec8bd..541747e38f8 100644
--- a/src/hotspot/share/gc/shared/space.hpp
+++ b/src/hotspot/share/gc/shared/space.hpp
@@ -51,7 +51,6 @@ class Generation;
 class ContiguousSpace;
 class CardTableRS;
 class DirtyCardToOopClosure;
-class FilteringClosure;
 
 // A Space describes a heap area. Class Space is an abstract
 // base class.
diff --git a/src/hotspot/share/oops/oop.hpp b/src/hotspot/share/oops/oop.hpp
index 50d8b6041b6..75bc3d9af72 100644
--- a/src/hotspot/share/oops/oop.hpp
+++ b/src/hotspot/share/oops/oop.hpp
@@ -45,8 +45,6 @@
 
 // Forward declarations.
 class OopClosure;
-class FilteringClosure;
-
 class PSPromotionManager;
 class ParCompactionManager;