diff --git a/src/cascadia/TerminalCore/Terminal.cpp b/src/cascadia/TerminalCore/Terminal.cpp
index 79ad756b59a..aba4d68de66 100644
--- a/src/cascadia/TerminalCore/Terminal.cpp
+++ b/src/cascadia/TerminalCore/Terminal.cpp
@@ -862,7 +862,7 @@ WORD Terminal::_TakeVirtualKeyFromLastKeyEvent(const WORD scanCode) noexcept
     return std::unique_lock{ _readWriteLock };
 }
 
-Microsoft::Console::Types::Viewport Terminal::_GetMutableViewport() const noexcept
+Viewport Terminal::_GetMutableViewport() const noexcept
 {
     return _mutableViewport;
 }