diff --git a/Source/player.cpp b/Source/player.cpp
index 73d6da155..4d9c832b3 100644
--- a/Source/player.cpp
+++ b/Source/player.cpp
@@ -2068,7 +2068,7 @@ void StartNewLvl(int pnum, int fom, int lvl)
 	if (pnum == myplr) {
 		plr[pnum]._pmode = PM_NEWLVL;
 		plr[pnum]._pInvincible = TRUE;
-		PostMessage(ghMainWnd, fom, 0, 0);
+		PostMessage(fom, 0, 0);
 		if (gbMaxPlayers > 1) {
 			NetSendCmdParam2(TRUE, CMD_NEWLVL, fom, lvl);
 		}
@@ -2094,7 +2094,7 @@ void RestartTownLvl(int pnum)
 	if (pnum == myplr) {
 		plr[pnum]._pmode = PM_NEWLVL;
 		plr[pnum]._pInvincible = TRUE;
-		PostMessage(ghMainWnd, WM_DIABRETOWN, 0, 0);
+		PostMessage(WM_DIABRETOWN, 0, 0);
 	}
 }
 
@@ -2114,7 +2114,7 @@ void StartWarpLvl(int pnum, int pidx)
 		SetCurrentPortal(pidx);
 		plr[pnum]._pmode = PM_NEWLVL;
 		plr[pnum]._pInvincible = TRUE;
-		PostMessage(ghMainWnd, WM_DIABWARPLVL, 0, 0);
+		PostMessage(WM_DIABWARPLVL, 0, 0);
 	}
 }
 
diff --git a/SourceS/miniwin/misc.h b/SourceS/miniwin/misc.h
index 7180fd083..050506d15 100644
--- a/SourceS/miniwin/misc.h
+++ b/SourceS/miniwin/misc.h
@@ -113,7 +113,6 @@ typedef struct tagSIZE {
 } SIZE;
 
 typedef struct tagMSG {
-	HWND hwnd;
 	UINT message;
 	WPARAM wParam;
 	LPARAM lParam;
@@ -199,7 +198,7 @@ WINBOOL WINAPI PeekMessageA(LPMSG lpMsg);
 
 WINBOOL WINAPI TranslateMessage(const MSG *lpMsg);
 LRESULT WINAPI DispatchMessageA(const MSG *lpMsg);
-WINBOOL WINAPI PostMessageA(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);
+WINBOOL WINAPI PostMessageA(UINT Msg, WPARAM wParam, LPARAM lParam);
 
 bool SpawnWindow(LPCSTR lpWindowName, int nWidth, int nHeight);
 
diff --git a/SourceX/miniwin/misc_msg.cpp b/SourceX/miniwin/misc_msg.cpp
index 3d2b52802..34c7cff5d 100644
--- a/SourceX/miniwin/misc_msg.cpp
+++ b/SourceX/miniwin/misc_msg.cpp
@@ -652,7 +652,7 @@ WINBOOL TranslateMessage(const MSG *lpMsg)
 #endif
 
 			// XXX: This does not add extended info to lParam
-			PostMessageA(lpMsg->hwnd, DVL_WM_CHAR, key, 0);
+			PostMessageA(DVL_WM_CHAR, key, 0);
 		}
 	}
 
@@ -690,15 +690,12 @@ LRESULT DispatchMessageA(const MSG *lpMsg)
 	assert(CurrentProc);
 	// assert(CurrentProc == GM_Game);
 
-	return CurrentProc(lpMsg->hwnd, lpMsg->message, lpMsg->wParam, lpMsg->lParam);
+	return CurrentProc(NULL, lpMsg->message, lpMsg->wParam, lpMsg->lParam);
 }
 
-WINBOOL PostMessageA(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam)
+WINBOOL PostMessageA(UINT Msg, WPARAM wParam, LPARAM lParam)
 {
-	assert(hWnd == 0);
-
 	MSG msg;
-	msg.hwnd = hWnd;
 	msg.message = Msg;
 	msg.wParam = wParam;
 	msg.lParam = lParam;