diff --git a/fpdfsdk/cpdfsdk_annothandlermgr.cpp b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
index 52ab4dd..37d5274 100644
--- a/fpdfsdk/cpdfsdk_annothandlermgr.cpp
+++ b/fpdfsdk/cpdfsdk_annothandlermgr.cpp
@@ -90,6 +90,22 @@
   GetAnnotHandler(pAnnot)->ReplaceSelection(pAnnot, text);
 }
 
+bool CPDFSDK_AnnotHandlerMgr::Annot_CanUndo(CPDFSDK_Annot* pAnnot) {
+  return GetAnnotHandler(pAnnot)->CanUndo(pAnnot);
+}
+
+bool CPDFSDK_AnnotHandlerMgr::Annot_CanRedo(CPDFSDK_Annot* pAnnot) {
+  return GetAnnotHandler(pAnnot)->CanRedo(pAnnot);
+}
+
+bool CPDFSDK_AnnotHandlerMgr::Annot_Undo(CPDFSDK_Annot* pAnnot) {
+  return GetAnnotHandler(pAnnot)->Undo(pAnnot);
+}
+
+bool CPDFSDK_AnnotHandlerMgr::Annot_Redo(CPDFSDK_Annot* pAnnot) {
+  return GetAnnotHandler(pAnnot)->Redo(pAnnot);
+}
+
 IPDFSDK_AnnotHandler* CPDFSDK_AnnotHandlerMgr::GetAnnotHandler(
     CPDFSDK_Annot* pAnnot) const {
   return GetAnnotHandler(pAnnot->GetAnnotSubtype());