diff --git a/subjects/java/checkpoints/distinct-substring-lenght/ExerciseRunner.java b/subjects/java/checkpoints/distinct-substring-length/ExerciseRunner.java
similarity index 100%
rename from subjects/java/checkpoints/distinct-substring-lenght/ExerciseRunner.java
rename to subjects/java/checkpoints/distinct-substring-length/ExerciseRunner.java
diff --git a/subjects/java/checkpoints/distinct-substring-lenght/README.md b/subjects/java/checkpoints/distinct-substring-length/README.md
similarity index 100%
rename from subjects/java/checkpoints/distinct-substring-lenght/README.md
rename to subjects/java/checkpoints/distinct-substring-length/README.md