diff --git a/qerror.c b/qerror.c
index cce1e7befa..2f6f59061f 100644
--- a/qerror.c
+++ b/qerror.c
@@ -176,6 +176,10 @@ static const QErrorStringTable qerror_table[] = {
         .error_fmt = QERR_QMP_BAD_INPUT_OBJECT_MEMBER,
         .desc      = "QMP input object member '%(member)' expects '%(expected)'",
     },
+    {
+        .error_fmt = QERR_QMP_EXTRA_MEMBER,
+        .desc      = "QMP input object member '%(member)' is unexpected",
+    },
     {
         .error_fmt = QERR_SET_PASSWD_FAILED,
         .desc      = "Could not set password",
diff --git a/qerror.h b/qerror.h
index 77ae57464e..9ad00b4b82 100644
--- a/qerror.h
+++ b/qerror.h
@@ -148,6 +148,9 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_QMP_BAD_INPUT_OBJECT_MEMBER \
     "{ 'class': 'QMPBadInputObjectMember', 'data': { 'member': %s, 'expected': %s } }"
 
+#define QERR_QMP_EXTRA_MEMBER \
+    "{ 'class': 'QMPExtraInputObjectMember', 'data': { 'member': %s } }"
+
 #define QERR_SET_PASSWD_FAILED \
     "{ 'class': 'SetPasswdFailed', 'data': {} }"