diff --git a/src/document.h b/src/document.h
index 69e45e51..f9c866ad 100644
--- a/src/document.h
+++ b/src/document.h
@@ -990,7 +990,7 @@ struct Document {
                 ClearSelectionRefresh();
                 return _(L"Evaluation finished.");
 
-            case A_UNDO:
+            case wxID_UNDO:
                 if (undolist.size()) {
                     Undo(dc, undolist, redolist);
                     return nullptr;
diff --git a/src/main.cpp b/src/main.cpp
index 5fc08cd9..f3891110 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -47,7 +47,6 @@ enum {
     A_SAVEALL = 500,
     A_COLLAPSE,
     A_NEWGRID,
-    A_UNDO,
     A_ABOUT,
     A_RUN,
     A_CLRVIEW,
diff --git a/src/myframe.h b/src/myframe.h
index 92c8bb84..bd9cf061 100644
--- a/src/myframe.h
+++ b/src/myframe.h
@@ -381,7 +381,7 @@ struct MyFrame : wxFrame {
                      _(L"only sets the colors and style of the copied cell, and keeps the text"));
             MyAppend(editmenu, A_COLLAPSE, _(L"Collapse Ce&lls\tCTRL+l"));
             editmenu->AppendSeparator();
-            MyAppend(editmenu, A_UNDO, _(L"&Undo\tCTRL+z"),
+            MyAppend(editmenu, wxID_UNDO, _(L"&Undo\tCTRL+z"),
                      _(L"revert the changes, one step at a time"));
             MyAppend(editmenu, A_REDO, _(L"&Redo\tCTRL+y"),
                      _(L"redo any undo steps, if you haven't made changes since"));
@@ -649,7 +649,7 @@ struct MyFrame : wxFrame {
         AddTBIcon(_(L"Save (CTRL+s)"), wxID_SAVE, iconpath + L"filesave.svg");
         AddTBIcon(_(L"Save As"), wxID_SAVEAS, iconpath + L"filesaveas.svg");
         SEPARATOR;
-        AddTBIcon(_(L"Undo (CTRL+z)"), A_UNDO, iconpath + L"undo.svg");
+        AddTBIcon(_(L"Undo (CTRL+z)"), wxID_UNDO, iconpath + L"undo.svg");
         AddTBIcon(_(L"Copy (CTRL+c)"), wxID_COPY, iconpath + L"editcopy.svg");
         AddTBIcon(_(L"Paste (CTRL+v)"), wxID_PASTE, iconpath + L"editpaste.svg");
         SEPARATOR;