diff --git a/autotests/parttest.h b/autotests/parttest.h
--- a/autotests/parttest.h
+++ b/autotests/parttest.h
@@ -33,6 +33,7 @@
 
     void testOpenUrlArguments();
     void testAutomaticMimeType();
+    void testEmptyUrlAfterCloseUrl();
 
     void testToolbarVisibility();
 };
diff --git a/autotests/parttest.cpp b/autotests/parttest.cpp
--- a/autotests/parttest.cpp
+++ b/autotests/parttest.cpp
@@ -170,6 +170,17 @@
     delete part;
 }
 
+void PartTest::testEmptyUrlAfterCloseUrl()
+{
+    TestPart *part = new TestPart(nullptr, nullptr);
+    QVERIFY(part->openUrl(QUrl::fromLocalFile(QFINDTESTDATA("parttest.cpp"))));
+    QVERIFY(!part->url().isEmpty());
+    QVERIFY(part->closeUrl());
+    QVERIFY(part->url().isEmpty());
+
+    delete part;
+}
+
 #include <kparts/mainwindow.h>
 #include <ktoolbar.h>
 #include <kconfiggroup.h>
diff --git a/src/readonlypart.cpp b/src/readonlypart.cpp
--- a/src/readonlypart.cpp
+++ b/src/readonlypart.cpp
@@ -245,6 +245,7 @@
     abortLoad(); //just in case
 
     d->m_arguments = KParts::OpenUrlArguments();
+    d->m_url = QUrl();
 
     if (d->m_bTemp) {
         QFile::remove(d->m_file);