diff --git a/src/build_reference_db.c b/src/build_reference_db.c
old mode 100644
new mode 100755
index 9335d01..6e3676b
--- a/src/build_reference_db.c
+++ b/src/build_reference_db.c
@@ -1,5 +1,5 @@
 /***********************************************************************************
- * Functions to build referece databases for the taxonomic assignment of sequences *
+ * Functions to build reference databases for the taxonomic assignment of sequences *
  ***********************************************************************************/
 
 /**