diff --git a/kernel/pty.cpp b/kernel/pty.cpp
index 23f87c20..a31e6699 100644
--- a/kernel/pty.cpp
+++ b/kernel/pty.cpp
@@ -547,7 +547,7 @@ ssize_t PTY::master_write(ioctx_t* ctx, const uint8_t* buf, size_t count)
 	{
 		if ( ctx->dflags & O_NONBLOCK )
 			return errno = EWOULDBLOCK, -1;
-		if ( !kthread_cond_wait_signal(&output_ready_cond, &termlock) )
+		if ( !kthread_cond_wait_signal(&output_possible_cond, &termlock) )
 			return errno = EINTR, -1;
 	}
 	size_t sofar = 0;