diff --git a/src/main/java/fr/pasteur/ida/zellige/steps/projection/ReferenceSurfaceProjection.java b/src/main/java/fr/pasteur/ida/zellige/steps/projection/ReferenceSurfaceProjection.java
index b24cd40375b50ef7103b74a64e589ef3e1b52f31..430412681c451d66a79318d23126a68c295f302e 100644
--- a/src/main/java/fr/pasteur/ida/zellige/steps/projection/ReferenceSurfaceProjection.java
+++ b/src/main/java/fr/pasteur/ida/zellige/steps/projection/ReferenceSurfaceProjection.java
@@ -126,7 +126,7 @@ public class ReferenceSurfaceProjection< T extends RealType< T > & NativeType< T
     /**
      * @param <T>              the type of the reference surface
      * @param referenceSurface the considered reference surface
-     * @param channel
+     * @param channel          the desired channel
      * @param delta            the desired user volume value
      * @return the extracted height map subStack
      */