diff --git a/src/zanshin/migrator/zanshin021migrator.h b/src/zanshin/migrator/zanshin021migrator.h
--- a/src/zanshin/migrator/zanshin021migrator.h
+++ b/src/zanshin/migrator/zanshin021migrator.h
@@ -21,6 +21,9 @@
    USA.
 */
 
+#ifndef ZANSHIN021MIGRATOR_H
+#define ZANSHIN021MIGRATOR_H
+
 #include <AkonadiCore/Item>
 #include <akonadi/akonadistorage.h>
 
@@ -75,3 +78,4 @@
 
 };
 
+#endif // ZANSHIN021MIGRATOR_H
diff --git a/tests/testlib/akonadidebug.h b/tests/testlib/akonadidebug.h
--- a/tests/testlib/akonadidebug.h
+++ b/tests/testlib/akonadidebug.h
@@ -21,10 +21,15 @@
    USA.
 */
 
+#ifndef AKONADIDEBUG_H
+#define AKONADIDEBUG_H
+
 #include "akonadi/akonadistorageinterface.h"
 
 namespace TestLib {
     namespace AkonadiDebug {
         void dumpTree(const Akonadi::StorageInterface::Ptr &storage);
     }
 }
+
+#endif // AKONADIDEBUG_H
diff --git a/tests/testlib/qtest_gui_zanshin.h b/tests/testlib/qtest_gui_zanshin.h
--- a/tests/testlib/qtest_gui_zanshin.h
+++ b/tests/testlib/qtest_gui_zanshin.h
@@ -21,6 +21,10 @@
    USA.
 */
 
+#ifndef QTEST_GUI_ZANSHIN_H
+#define QTEST_GUI_ZANSHIN_H
+
 #include <QtTestGui>
 #include <testlib/qtest_zanshin.h>
 
+#endif // QTEST_GUI_ZANSHIN_H
diff --git a/tests/testlib/qtest_zanshin.h b/tests/testlib/qtest_zanshin.h
--- a/tests/testlib/qtest_zanshin.h
+++ b/tests/testlib/qtest_zanshin.h
@@ -21,6 +21,9 @@
    USA.
 */
 
+#ifndef QTEST_ZANSHIN_H
+#define QTEST_ZANSHIN_H
+
 #include <QtTest>
 #include <QDebug>
 
@@ -69,3 +72,5 @@
     } \
     \
     QTEST_MAIN(TestCase)
+
+#endif // QTEST_ZANSHIN_H
diff --git a/tests/testlib/testsafety.h b/tests/testlib/testsafety.h
--- a/tests/testlib/testsafety.h
+++ b/tests/testlib/testsafety.h
@@ -21,6 +21,9 @@
    USA.
 */
 
+#ifndef TESTSAFETY_H
+#define TESTSAFETY_H
+
 #include <QTest>
 #include <QDebug>
 
@@ -42,3 +45,4 @@
     }
 }
 
+#endif // TESTSAFETY_H