diff --git a/SiaDrive/SiaDriveDlg.cpp b/SiaDrive/SiaDriveDlg.cpp
index dbfef4a..770e80f 100644
--- a/SiaDrive/SiaDriveDlg.cpp
+++ b/SiaDrive/SiaDriveDlg.cpp
@@ -269,7 +269,7 @@ void CSiaDriveDlg::OnMnuItemExit()
 
 void CSiaDriveDlg::OnMnuItemToggle()
 {
-	const bool visible = IsWindowVisible();
+	const BOOL visible = IsWindowVisible();
 	ShowWindow(visible ? SW_HIDE : SW_SHOW);
 	if (!visible && IsIconic())
 	{