diff --git a/emoji/src/main/java/com/gluonhq/emoji/DownloadableEmojiSpriteLoader.java b/emoji/src/main/java/com/gluonhq/emoji/DownloadableEmojiSpriteLoader.java
index 692af76..e5a89eb 100644
--- a/emoji/src/main/java/com/gluonhq/emoji/DownloadableEmojiSpriteLoader.java
+++ b/emoji/src/main/java/com/gluonhq/emoji/DownloadableEmojiSpriteLoader.java
@@ -171,6 +171,6 @@ private Path getLocalFilePath(int size) {
     }
 
     private Path getLockFilePath(int size) {
-        return Paths.get(String.format(LOCAL_PATH, commit)).resolve(size + ".downloading");
+        return Paths.get(String.format(LOCAL_PATH, commit)).resolve(size + ".lck");
     }
 }