diff --git a/src/kmer_similarity.h b/src/kmer_similarity.h
index 5bac38c..ada665f 100755
--- a/src/kmer_similarity.h
+++ b/src/kmer_similarity.h
@@ -27,7 +27,7 @@
  * @brief Alignment structure, with informations about the similarity and to rebuild the alignment.
  */
 typedef struct Obi_ali {
-	int      score;	    		/**< Alignment score, corresponding to the number of matches (identical nucleotides aligned).
+	int      score;	    		/**< Alignment score, corresponding to the number of nucleotides in the longest stretch of kmers perfectly matching.
 	 	 	 	 	 	 	 	 */
 	int      consensus_length; 	/**< Length of the final consensus sequence.
 	 	 	 	 	 	 	 	 */