diff --git a/programs/system/board/trunk/board.asm b/programs/system/board/trunk/board.asm
index ba8cdf945..1cfe850b7 100644
--- a/programs/system/board/trunk/board.asm
+++ b/programs/system/board/trunk/board.asm
@@ -406,6 +406,7 @@ CheckUnique:
 	jmp .check_threads
 
 .close_program:
+	mcall 18,3 ; restore and active window of previous thread
 	mov eax, -1
 	mcall