diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 535ee78c6f6e2e0b2b55bba73db2a0c29599a59b..3756ff309ad1864f172945f4c505645cb4a67582 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -8399,7 +8399,7 @@ qemuDomainSnapshotWriteMetadata(virDomainObjPtr vm,
                                 virDomainSnapshotObjPtr snapshot,
                                 virCapsPtr caps,
                                 virDomainXMLOptionPtr xmlopt,
-                                char *snapshotDir)
+                                const char *snapshotDir)
 {
     char *newxml = NULL;
     int ret = -1;
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index 7c6b50184c8d12eb8bed4492f0c5cb3063011aa5..37c9813ec5cc941f1cbfb8a084d672b1ca40c8d6 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -683,7 +683,7 @@ int qemuDomainSnapshotWriteMetadata(virDomainObjPtr vm,
                                     virDomainSnapshotObjPtr snapshot,
                                     virCapsPtr caps,
                                     virDomainXMLOptionPtr xmlopt,
-                                    char *snapshotDir);
+                                    const char *snapshotDir);
 
 int qemuDomainSnapshotForEachQcow2(virQEMUDriverPtr driver,
                                    virDomainObjPtr vm,