diff --git a/OsmAnd-java/src/main/java/net/osmand/binary/BinaryMapIndexReader.java b/OsmAnd-java/src/main/java/net/osmand/binary/BinaryMapIndexReader.java
index e26f9de7f8..33553bc779 100644
--- a/OsmAnd-java/src/main/java/net/osmand/binary/BinaryMapIndexReader.java
+++ b/OsmAnd-java/src/main/java/net/osmand/binary/BinaryMapIndexReader.java
@@ -428,7 +428,10 @@ public class BinaryMapIndexReader {
 				if (ls.endsWith("_2")) {
 					ls = ls.substring(0, ls.length() - "_2".length());
 				}
-				return ls.substring(0, ls.lastIndexOf('_')).replace('_', ' ');
+				if (ls.lastIndexOf('_') != -1) {
+					ls = ls.substring(0, ls.lastIndexOf('_')).replace('_', ' ');
+				}
+				return ls;
 			}
 
 		}