diff --git a/Frameworks/midi_processing/midi_processing/midi_container.cpp b/Frameworks/midi_processing/midi_processing/midi_container.cpp
index c365fecdf..d090b58da 100644
--- a/Frameworks/midi_processing/midi_processing/midi_container.cpp
+++ b/Frameworks/midi_processing/midi_processing/midi_container.cpp
@@ -338,7 +338,9 @@ void midi_container::initialize( unsigned p_form, unsigned p_dtx )
 		m_timestamp_end[ 0 ] = 0;
         m_timestamp_loop_start.resize( 1 );
         m_timestamp_loop_end.resize( 1 );
-	}
+	}
+    int port = 0;
+	limit_port_number(port);
 }
 
 void midi_container::add_track( const midi_track & p_track )