diff --git a/RGBEPP.d b/RGBEPP.d
index 7a2445d..1d868db 100644
--- a/RGBEPP.d
+++ b/RGBEPP.d
@@ -19,7 +19,7 @@ void show_help(string pkgver) {
 	    -c\t--config\tconfig file for software path (optional)
 	    -g\t--genes\t\tgene file path (optional, if -r is specified)
 	    -f\t--functions\tfunctions type (optional): all clean map 
-	      \t           \tpostmap varcall consen align
+	      \t           \tpostmap varcall consen codon align trim
 	    -h\t--help\t\tshow this information
 	    -l\t--list\t\tlist file path
 	    -m\t--memory\tmemory settings (optional, default 16 GB)
@@ -765,7 +765,7 @@ void main(string[] args) {
 	}
     }
 
-    if (ARG_F == "all" && enableCodon) {
+    if (ARG_F == "all" && enableCodon || ARG_F == "codon") {
 	if(testFiles([PathExonerate]) && testStringArray(ARG_G) && testString(ARG_R)){
 	  processCodon(ARG_G, ARG_R, DirConsensus, PathExonerate); //ARG_G
 	} else {