diff --git a/inst/scripts/add_annotation.R b/inst/scripts/add_annotation.R
index 1fc190d..611c176 100755
--- a/inst/scripts/add_annotation.R
+++ b/inst/scripts/add_annotation.R
@@ -34,9 +34,9 @@ option_list <- list(
 	optparse::make_option(c("-o", "--output_file"), type="character", default='Annotated_table.txt',
                         help="Define the output path. Default = %default"),
 	optparse::make_option(c("-c", "--column"), type="character", default=1,
-                        help="Column name or index with ensembl_IDs. Default = %default"),
+                        help="Column name or index or 'rownames' with ensembl_IDs. Default = %default"),
   optparse::make_option(c("-m", "--mirna"), type= "logical", default = FALSE, action ="store_true",
-                        help= "Indicate if the ids to translate are miRNA (from miRBase to mature ID). If activated, -I and -K are ignored"),
+                        help= "Indicate if the ids to translate are miRNA (from miRBase to mature ID). If activated -O, -I and -K are ignored"),
 	optparse::make_option(c("-I", "--input_keytype"), type="character", default=NULL,
                         help="Set the input keytype. Default=%default : All possible keytypes will be printed"),
 	optparse::make_option(c("-K", "--output_keytype"), type="character", default="SYMBOL",