diff --git a/src/pty.c b/src/pty.c
index 2a03121..920473a 100644
--- a/src/pty.c
+++ b/src/pty.c
@@ -428,6 +428,22 @@ buf:
 	return 0;
 }
 
+void kmscon_pty_signal(struct kmscon_pty *pty, int signum)
+{
+	int ret;
+
+	if (!pty || !pty_is_open(pty) || signum < 0)
+		return;
+
+	ret = ioctl(pty->fd, TIOCSIG, signum);
+	if (ret) {
+		log_warn("cannot send signal %d to child", signum);
+		return;
+	}
+
+	log_debug("send signal %d to child", signum);
+}
+
 void kmscon_pty_resize(struct kmscon_pty *pty,
 			unsigned short width, unsigned short height)
 {
diff --git a/src/pty.h b/src/pty.h
index 675cc17..d8d9214 100644
--- a/src/pty.h
+++ b/src/pty.h
@@ -60,11 +60,7 @@ int kmscon_pty_open(struct kmscon_pty *pty, unsigned short width,
 void kmscon_pty_close(struct kmscon_pty *pty);
 
 int kmscon_pty_write(struct kmscon_pty *pty, const char *u8, size_t len);
-
-/*
- * Call this whenever the size of the screen (rows or columns) changes. The
- * kernel and child process need to be notified.
- */
+void kmscon_pty_signal(struct kmscon_pty *pty, int signum);
 void kmscon_pty_resize(struct kmscon_pty *pty,
 			unsigned short width, unsigned short height);