--- a/metric-providers/org.ossmeter.metricprovider.trans.rascal.fieldchurn/src/FieldChurn.rsc
+++ b/metric-providers/org.ossmeter.metricprovider.trans.rascal.fieldchurn/src/FieldChurn.rsc
@@ -6,7 +6,8 @@
@metric{fieldChurn}
@doc{fieldChurn}
@friendlyName{fieldChurn}
-int getFieldChurn(ProjectDelta delta, map[str, loc] workingCopyFolders, map[str, loc] scratchFolders) {
+@appliesTo{java()}
+int getFieldChurn(ProjectDelta delta = \empty()) {
int churnCount = 0;
visit(fieldChurn) {
case fieldModifierChanged(loc locator, set [Modifier] oldModifiers, set [Modifier] newModifiers): churnCount += 1;