diff --git a/OsmAnd-java/src/main/java/net/osmand/IndexConstants.java b/OsmAnd-java/src/main/java/net/osmand/IndexConstants.java
index 554eb7ced3..d8ff7ba61b 100644
--- a/OsmAnd-java/src/main/java/net/osmand/IndexConstants.java
+++ b/OsmAnd-java/src/main/java/net/osmand/IndexConstants.java
@@ -27,6 +27,7 @@ public class IndexConstants {
 	public static final String BINARY_ROAD_MAP_INDEX_EXT = ".road.obf"; //$NON-NLS-1$
 	public static final String BINARY_ROAD_MAP_INDEX_EXT_ZIP = ".road.obf.zip"; //$NON-NLS-1$
 	public static final String BINARY_SRTM_MAP_INDEX_EXT = ".srtm.obf"; //$NON-NLS-1$
+	public static final String BINARY_SRTM_FEET_MAP_INDEX_EXT = ".srtmf.obf"; //$NON-NLS-1$
 	public static final String BINARY_SRTM_MAP_INDEX_EXT_ZIP = ".srtm.obf.zip"; //$NON-NLS-1$
 	public static final String EXTRA_EXT = ".extra";
 	public static final String EXTRA_ZIP_EXT = ".extra.zip";