diff --git a/src/core/src/smf/smf.cpp b/src/core/src/smf/smf.cpp
index 5a07441f0..bd5cabaaf 100644
--- a/src/core/src/smf/smf.cpp
+++ b/src/core/src/smf/smf.cpp
@@ -278,8 +278,8 @@ void SMFWriter::save( const QString& sFilename, Song *pSong )
 				FOREACH_NOTE_CST_IT_BOUND(notes,it,nNote) {
 					Note *pNote = it->second;
 					if ( pNote ) {
-						float rnd = (float)rand()/(float)RAND_MAX;
-						if ( pNote->get_probability() < rnd ) {
+						float threshold = pSong->get_threshold();
+						if ( pNote->get_probability() < threshold ) {
 							continue;
 						}