diff --git a/src/inc/conpty-static.h b/src/inc/conpty-static.h
index cba57ac280..adbb3df650 100644
--- a/src/inc/conpty-static.h
+++ b/src/inc/conpty-static.h
@@ -42,7 +42,7 @@ CONPTY_EXPORT HRESULT WINAPI ConptyCreatePseudoConsoleAsUser(HANDLE hToken, COOR
 
 CONPTY_EXPORT HRESULT WINAPI ConptyResizePseudoConsole(HPCON hPC, COORD size);
 CONPTY_EXPORT HRESULT WINAPI ConptyClearPseudoConsole(HPCON hPC, BOOL keepCursorRow);
-CONPTY_EXPORT HRESULT WINAPI ConptyShowHidePseudoConsole(HPCON hPC, bool show);
+CONPTY_EXPORT HRESULT WINAPI ConptyShowHidePseudoConsole(HPCON hPC, BOOL show);
 CONPTY_EXPORT HRESULT WINAPI ConptyReparentPseudoConsole(HPCON hPC, HWND newParent);
 CONPTY_EXPORT HRESULT WINAPI ConptyReleasePseudoConsole(HPCON hPC);
 
diff --git a/src/winconpty/winconpty.cpp b/src/winconpty/winconpty.cpp
index 832b78c11b..09cc46e5de 100644
--- a/src/winconpty/winconpty.cpp
+++ b/src/winconpty/winconpty.cpp
@@ -332,7 +332,7 @@ static HRESULT _ClearPseudoConsole(_In_ const PseudoConsole* const pPty, BOOL ke
 // Return Value:
 // - S_OK if the call succeeded, else an appropriate HRESULT for failing to
 //      write the clear message to the pty.
-HRESULT _ShowHidePseudoConsole(_In_ const PseudoConsole* const pPty, const bool show)
+HRESULT _ShowHidePseudoConsole(_In_ const PseudoConsole* const pPty, const BOOL show) noexcept
 {
     if (pPty == nullptr)
     {
@@ -340,7 +340,7 @@ HRESULT _ShowHidePseudoConsole(_In_ const PseudoConsole* const pPty, const bool
     }
     unsigned short signalPacket[2];
     signalPacket[0] = PTY_SIGNAL_SHOWHIDE_WINDOW;
-    signalPacket[1] = show;
+    signalPacket[1] = show ? 1 : 0;
 
     const BOOL fSuccess = WriteFile(pPty->hSignal, signalPacket, sizeof(signalPacket), nullptr, nullptr);
     return fSuccess ? S_OK : HRESULT_FROM_WIN32(GetLastError());
@@ -539,7 +539,7 @@ extern "C" HRESULT WINAPI ConptyClearPseudoConsole(_In_ HPCON hPC, BOOL keepCurs
 //   to keep ConPTY's internal HWND state in sync with the state of whatever the
 //   hosting window is.
 // - For more information, refer to GH#12515.
-extern "C" HRESULT WINAPI ConptyShowHidePseudoConsole(_In_ HPCON hPC, bool show)
+extern "C" HRESULT WINAPI ConptyShowHidePseudoConsole(_In_ HPCON hPC, BOOL show)
 {
     // _ShowHidePseudoConsole will return E_INVALIDARG for us if the hPC is nullptr.
     return _ShowHidePseudoConsole((PseudoConsole*)hPC, show);