diff --git a/planetiler-core/src/main/java/com/onthegomap/planetiler/util/Format.java b/planetiler-core/src/main/java/com/onthegomap/planetiler/util/Format.java
index ba6781c8..5ef5c7f6 100644
--- a/planetiler-core/src/main/java/com/onthegomap/planetiler/util/Format.java
+++ b/planetiler-core/src/main/java/com/onthegomap/planetiler/util/Format.java
@@ -22,7 +22,7 @@ public class Format {
 
   private static final ConcurrentMap<Locale, Format> instances = new ConcurrentHashMap<>();
   @SuppressWarnings("java:S5164")
-  private static final NumberFormat latLonNF = NumberFormat.getIntegerInstance();
+  private static final NumberFormat latLonNF = NumberFormat.getIntegerInstance(Locale.US);
   private static final NavigableMap<Long, String> STORAGE_SUFFIXES = new TreeMap<>(Map.ofEntries(
     Map.entry(1_000L, "k"),
     Map.entry(1_000_000L, "M"),