diff --git a/headers/private/interface/BMCPrivate.h b/headers/private/interface/BMCPrivate.h
index dc97ba3fa9..f8ff7036ff 100644
--- a/headers/private/interface/BMCPrivate.h
+++ b/headers/private/interface/BMCPrivate.h
@@ -54,6 +54,7 @@ public:
 			bool				IsPopUpMarkerShown() const
 									{ return fShowPopUpMarker; }
 
+	virtual BSize				MinSize();
 	virtual	BSize				MaxSize();
 
 private:
diff --git a/src/kits/interface/BMCPrivate.cpp b/src/kits/interface/BMCPrivate.cpp
index ecdea82389..80d6b494f0 100644
--- a/src/kits/interface/BMCPrivate.cpp
+++ b/src/kits/interface/BMCPrivate.cpp
@@ -362,6 +362,16 @@ _BMCMenuBar_::MakeFocus(bool focused)
 }
 
 
+BSize
+_BMCMenuBar_::MinSize()
+{
+	BSize size;
+	BMenuBar::GetPreferredSize(&size.width, &size.height);
+	// account for popup indicator + a few pixels margin
+	size.width += 13.0;
+	return BLayoutUtils::ComposeSize(ExplicitMinSize(), size);
+}
+
 BSize
 _BMCMenuBar_::MaxSize()
 {