diff --git a/source/lib/sysdep/win/wgl.h b/source/lib/sysdep/win/wgl.h
index 0b14aea76f..67a0e9285e 100755
--- a/source/lib/sysdep/win/wgl.h
+++ b/source/lib/sysdep/win/wgl.h
@@ -42,8 +42,8 @@ WINGDIAPI BOOL  WINAPI wglCopyContext(HGLRC, HGLRC, UINT);
 WINGDIAPI HGLRC WINAPI wglCreateContext(HDC);
 WINGDIAPI HGLRC WINAPI wglCreateLayerContext(HDC, int);
 WINGDIAPI BOOL  WINAPI wglDeleteContext(HGLRC);
-WINGDIAPI HGLRC WINAPI wglGetCurrentContext(VOID);
-WINGDIAPI HDC   WINAPI wglGetCurrentDC(VOID);
+WINGDIAPI HGLRC WINAPI wglGetCurrentContext();
+WINGDIAPI HDC   WINAPI wglGetCurrentDC();
 WINGDIAPI PROC  WINAPI wglGetProcAddress(LPCSTR);
 WINGDIAPI BOOL  WINAPI wglMakeCurrent(HDC, HGLRC);
 WINGDIAPI BOOL  WINAPI wglShareLists(HGLRC, HGLRC);