diff --git a/test/test-oneshot-and-hangup.c b/test/test-oneshot-and-hangup.c
index ecf58c9..ff1d731 100644
--- a/test/test-oneshot-and-hangup.c
+++ b/test/test-oneshot-and-hangup.c
@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>