diff --git a/SourceS/miniwin/misc.h b/SourceS/miniwin/misc.h
index 18fdb01df..3965de30b 100644
--- a/SourceS/miniwin/misc.h
+++ b/SourceS/miniwin/misc.h
@@ -4,12 +4,10 @@ namespace devilution {
 
 typedef uint16_t SHORT;
 typedef int32_t LONG;
-typedef uint8_t BOOLEAN;
 
 typedef unsigned char UCHAR;
 
 typedef uint32_t DWORD;
-typedef int BOOL;
 typedef unsigned char BYTE;
 typedef unsigned short WORD;
 typedef DWORD *LPDWORD;
@@ -51,13 +49,6 @@ bool TranslateMessage(const MSG *lpMsg);
 void PushMessage(const MSG *lpMsg);
 bool PostMessage(UINT Msg, WPARAM wParam, LPARAM lParam);
 
-#ifndef TRUE
-#define TRUE true
-#endif
-#ifndef false
-#define FALSE false
-#endif
-
 //
 // MSCVRT emulation
 //