diff --git a/sys/windows/win10.h b/sys/windows/win10.h
index fd9c9a895..41ad2eb5b 100644
--- a/sys/windows/win10.h
+++ b/sys/windows/win10.h
@@ -7,28 +7,6 @@
 
 #include "win32api.h"
 
-#ifdef __MINGW32__
-#ifndef DECLARE_HANDLE
-#define DECLARE_HANDLE(name) struct name##__{int unused;}; typedef struct name##__ *name
-#endif
-DECLARE_HANDLE(DPI_AWARENESS_CONTEXT);
-
-/* DPI awareness */
-typedef enum DPI_AWARENESS
-{
-    DPI_AWARENESS_INVALID = -1,
-    DPI_AWARENESS_UNAWARE = 0,
-    DPI_AWARENESS_SYSTEM_AWARE,
-    DPI_AWARENESS_PER_MONITOR_AWARE
-} DPI_AWARENESS;
-
-#define DPI_AWARENESS_CONTEXT_UNAWARE              ((DPI_AWARENESS_CONTEXT)-1)
-#define DPI_AWARENESS_CONTEXT_SYSTEM_AWARE         ((DPI_AWARENESS_CONTEXT)-2)
-#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE    ((DPI_AWARENESS_CONTEXT)-3)
-#define DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 ((DPI_AWARENESS_CONTEXT)-4)
-#define DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED    ((DPI_AWARENESS_CONTEXT)-5)
-#endif
-
 typedef struct {
     double  scale;  // dpi of monitor / 96
     int     width;  // in pixels