diff --git a/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/CityMatch.java b/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/CityMatch.java
index 998a526..2362f47 100644
--- a/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/CityMatch.java
+++ b/dnet-pace-core/src/main/java/eu/dnetlib/pace/tree/CityMatch.java
@@ -41,7 +41,7 @@ public class CityMatch extends AbstractComparator {
         else {
             if (codes1.isEmpty() ^ codes2.isEmpty())
                 return -1; //undefined if one of the two has no cities
-            return commonElementsPercentage(codes1, codes2) > Integer.parseInt(params.getOrDefault("threshold", "0")) ? 1.0 : 0.0;
+            return commonElementsPercentage(codes1, codes2) > Double.parseDouble(params.getOrDefault("threshold", "0.0")) ? 1.0 : 0.0;
         }
     }
 }