diff --git a/src/gui/CommandDialog.cxx b/src/gui/CommandDialog.cxx
index d33fe3c57..6eaf714b7 100644
--- a/src/gui/CommandDialog.cxx
+++ b/src/gui/CommandDialog.cxx
@@ -65,7 +65,7 @@ CommandDialog::CommandDialog(OSystem& osystem, DialogContainer& parent)
   wid.push_back(myColorButton);
   myLeftDiffButton = ADD_CD_BUTTON("", kLeftDiffCmd);
   wid.push_back(myLeftDiffButton);
-  myRightDiffButton = ADD_CD_BUTTON("", kLeftDiffCmd);
+  myRightDiffButton = ADD_CD_BUTTON("", kRightDiffCmd);
   wid.push_back(myRightDiffButton);
 
   // Column 2
diff --git a/src/gui/MinUICommandDialog.cxx b/src/gui/MinUICommandDialog.cxx
index dbb17870a..b93b95890 100644
--- a/src/gui/MinUICommandDialog.cxx
+++ b/src/gui/MinUICommandDialog.cxx
@@ -67,7 +67,7 @@ MinUICommandDialog::MinUICommandDialog(OSystem& osystem, DialogContainer& parent
   wid.push_back(myColorButton);
   myLeftDiffButton = ADD_CD_BUTTON("", kLeftDiffCmd);
   wid.push_back(myLeftDiffButton);
-  myRightDiffButton = ADD_CD_BUTTON("", kLeftDiffCmd);
+  myRightDiffButton = ADD_CD_BUTTON("", kRightDiffCmd);
   wid.push_back(myRightDiffButton);
 
   // Column 2