diff --git a/src/core/UpgradeExtendedNoteRange.cpp b/src/core/UpgradeExtendedNoteRange.cpp
index aab47f6b1..41cbc5c26 100644
--- a/src/core/UpgradeExtendedNoteRange.cpp
+++ b/src/core/UpgradeExtendedNoteRange.cpp
@@ -27,6 +27,8 @@
 #include <QDomElement>
 
 #include <set>
+#include <cassert>
+
 
 namespace lmms
 {
@@ -428,4 +430,4 @@ void UpgradeExtendedNoteRange::upgrade()
 	}
 }
 
-}
+} // namespace lmms
diff --git a/src/core/UpgradeExtendedNoteRange.h b/src/core/UpgradeExtendedNoteRange.h
index 66f95419a..ae444e82a 100644
--- a/src/core/UpgradeExtendedNoteRange.h
+++ b/src/core/UpgradeExtendedNoteRange.h
@@ -42,6 +42,6 @@ private:
 	QDomElement & m_domElement;
 };
 
-}
+} // namespace lmms
 
 #endif // LMMS_UPGRADEEXTENDEDNOTERANGE_H