diff --git a/tests/test-string-input-visitor.c b/tests/test-string-input-visitor.c
index 4b48ec2..9e6906a 100644
--- a/tests/test-string-input-visitor.c
+++ b/tests/test-string-input-visitor.c
@@ -14,6 +14,7 @@
 #include <glib.h>
 
 #include "qemu-common.h"
+#include "qapi/error.h"
 #include "qapi/string-input-visitor.h"
 #include "test-qapi-types.h"
 #include "test-qapi-visit.h"