diff --git a/src/object/object-p.h b/src/object/object-p.h
index 8c0e2cf14..3e7f88145 100644
--- a/src/object/object-p.h
+++ b/src/object/object-p.h
@@ -29,7 +29,7 @@ LINPHONE_BEGIN_NAMESPACE
 
 class ObjectPrivate : public BaseObjectPrivate {
 protected:
-	constexpr const Object::Lock &getLock () const {
+	inline const Object::Lock &getLock () const {
 		return lock;
 	}