diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 5a678c9..d5ee16a 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -4871,8 +4871,7 @@ qemuDomainManagedSavePath(struct qemud_driver *driver, virDomainObjPtr vm) {
 }
 
 static int
-qemuDomainManagedSave(virDomainPtr dom,
-                      unsigned int flags ATTRIBUTE_UNUSED)
+qemuDomainManagedSave(virDomainPtr dom, unsigned int flags)
 {
     struct qemud_driver *driver = dom->conn->privateData;
     virDomainObjPtr vm = NULL;
@@ -4880,6 +4879,13 @@ qemuDomainManagedSave(virDomainPtr dom,
     int ret = -1;
     int compressed;
 
+    if (flags != 0) {
+        qemuReportError(VIR_ERR_INVALID_ARG,
+                        _("unsupported flags (0x%x) passed to '%s'"),
+                        flags, __FUNCTION__);
+        return -1;
+    }
+
     qemuDriverLock(driver);
     vm = virDomainFindByUUID(&driver->domains, dom->uuid);
     if (!vm) {
@@ -4932,14 +4938,20 @@ error:
 }
 
 static int
-qemuDomainHasManagedSaveImage(virDomainPtr dom,
-                              unsigned int flags ATTRIBUTE_UNUSED)
+qemuDomainHasManagedSaveImage(virDomainPtr dom, unsigned int flags)
 {
     struct qemud_driver *driver = dom->conn->privateData;
     virDomainObjPtr vm = NULL;
     int ret = -1;
     char *name = NULL;
 
+    if (flags != 0) {
+        qemuReportError(VIR_ERR_INVALID_ARG,
+                        _("unsupported flags (0x%x) passed to '%s'"),
+                        flags, __FUNCTION__);
+        return -1;
+    }
+
     qemuDriverLock(driver);
     vm = virDomainFindByUUID(&driver->domains, dom->uuid);
     if (!vm) {
@@ -4965,14 +4977,20 @@ cleanup:
 }
 
 static int
-qemuDomainManagedSaveRemove(virDomainPtr dom,
-                            unsigned int flags ATTRIBUTE_UNUSED)
+qemuDomainManagedSaveRemove(virDomainPtr dom, unsigned int flags)
 {
     struct qemud_driver *driver = dom->conn->privateData;
     virDomainObjPtr vm = NULL;
     int ret = -1;
     char *name = NULL;
 
+    if (flags != 0) {
+        qemuReportError(VIR_ERR_INVALID_ARG,
+                        _("unsupported flags (0x%x) passed to '%s'"),
+                        flags, __FUNCTION__);
+        return -1;
+    }
+
     qemuDriverLock(driver);
     vm = virDomainFindByUUID(&driver->domains, dom->uuid);
     if (!vm) {
@@ -6174,7 +6192,10 @@ static int qemudDomainStart(virDomainPtr dom) {
      */
     managed_save = qemuDomainManagedSavePath(driver, vm);
     if ((managed_save) && (virFileExists(managed_save))) {
-        /* We should still have a reference left to vm but */
+        /*
+         * We should still have a reference left to vm but
+         * but one should check for 0 anyway
+         */
         if (qemuDomainObjEndJob(vm) == 0)
             vm = NULL;
         virDomainObjUnlock(vm);