diff --git a/src/tools/moc/moc.cpp b/src/tools/moc/moc.cpp
index cc5cc929b9..c1fa36c87a 100644
--- a/src/tools/moc/moc.cpp
+++ b/src/tools/moc/moc.cpp
@@ -706,8 +706,10 @@ void Moc::parse()
                             switch (next()) {
                             case NAMESPACE:
                                 if (test(IDENTIFIER)) {
-                                    while (test(SCOPE))
+                                    while (test(SCOPE)) {
+                                        test(INLINE); // ignore inline namespaces
                                         next(IDENTIFIER);
+                                    }
                                     if (test(EQ)) {
                                         // namespace Foo = Bar::Baz;
                                         until(SEMIC);
diff --git a/tests/auto/tools/moc/tst_moc.cpp b/tests/auto/tools/moc/tst_moc.cpp
index b4d5525da3..a7fe0e9455 100644
--- a/tests/auto/tools/moc/tst_moc.cpp
+++ b/tests/auto/tools/moc/tst_moc.cpp
@@ -77,6 +77,9 @@ const char *string_hash_hash = STRING_HASH_HASH("baz");
    of writing this comment.
 */
 namespace A::inline B {}
+namespace A {
+   namespace B::inline C {}
+}
 #endif
 
 Q_DECLARE_METATYPE(const QMetaObject*);