diff --git a/kernel/pty.cpp b/kernel/pty.cpp
index 4b137512..4a90b828 100644
--- a/kernel/pty.cpp
+++ b/kernel/pty.cpp
@@ -656,6 +656,7 @@ int PTY::master_ioctl(ioctx_t* ctx, int cmd, uintptr_t arg)
 		const struct winsize* user_ws = (const struct winsize*) arg;
 		if ( !ctx->copy_from_src(&ws, user_ws, sizeof(ws)) )
 			return -1;
+		winch();
 		return 0;
 	}
 	return ioctl(ctx, cmd, arg);
diff --git a/kernel/tty.cpp b/kernel/tty.cpp
index c31f34c8..1dc9214a 100644
--- a/kernel/tty.cpp
+++ b/kernel/tty.cpp
@@ -324,6 +324,17 @@ void TTY::hup()
 	poll_channel.Signal(POLLHUP);
 }
 
+void TTY::winch() // termlock taken
+{
+	ScopedLock family_lock(&process_family_lock);
+	if ( 0 < foreground_pgid )
+	{
+		Process* process = CurrentProcess()->GetPTable()->Get(foreground_pgid);
+		if ( process )
+			process->DeliverGroupSignal(SIGWINCH);
+	}
+}
+
 void TTY::ProcessUnicode(uint32_t unicode)
 {
 	mbstate_t ps;
diff --git a/kernel/tty.h b/kernel/tty.h
index 930a8566..96f45e5f 100644
--- a/kernel/tty.h
+++ b/kernel/tty.h
@@ -78,6 +78,7 @@ public:
 
 public:
 	void hup();
+	void winch();
 
 protected:
 	void tty_output(const char* str)