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--- a/metric-providers/org.ossmeter.metricprovider.trans.rascal.churnpercommit/src/Churn.rsc
+++ b/metric-providers/org.ossmeter.metricprovider.trans.rascal.churnpercommit/src/Churn.rsc
@@ -7,9 +7,13 @@
 @doc{Count churn}
 @friendlyName{Counts number of lines added and deleted per commit}
 @appliesTo{generic()}
-map[str revision, int churn] churnPerCommit(ProjectDelta delta = \empty())
-  = (co.revision : churn(co) | /VcsCommit co := delta)
-  ;
+map[loc, int] churnPerCommit(ProjectDelta delta = \empty()) {
+   map[loc, int] result = ();
+   for (/VcsRepositoryDelta vcsDelta := delta) {
+    result += (vcsDelta.repository.url + co.revision : churn(co) | /VcsCommit co := vcsDelta);
+   }
+   return result;
+}
   
 int churn(VcsCommit item) 
   = (0 | it + count | /linesAdded(count) := item)