diff --git a/streamlines.h b/streamlines.h
index 050937f4d423a2c838dc36f934f378f0cb6d6a8c..e908d20edad34cc296dab56238ea7b18c4dbc86f 100644
--- a/streamlines.h
+++ b/streamlines.h
@@ -93,7 +93,7 @@ namespace TRACT{
     Matrix m_I;
     vector<ColumnVector> m_path;
     
-    vector<volume<int> > m_seedcounts;
+    vector<volume<float> > m_seedcounts;
     vector<volume<int> > m_targetmasks;
     vector<string> m_targetmasknames;
     vector<int> m_targflags;