diff --git a/README.md b/README.md
index 3fdb8b3fc8cb17c5aaf8123b906a8bf82528482e..503ad7adf25afe9832f085eb355c76dcfd48c30e 100644
--- a/README.md
+++ b/README.md
@@ -260,7 +260,7 @@ Options:
     -g, --grammar = the fst2 grammar to use
 
 Example:
-  $ do-concord -c unitex-fr.yaml *.txt
+  $ do-concord -c unitex-fr.yaml -g grammar.fst2 *.txt
 ```
 
 ## Useful links
diff --git a/examples/do-concord.py b/examples/do-concord.py
index ebf3220db196e9a31b54b882653c906758aa80c9..e8feff01c98bba823980bafca83d5a1a90ea2ff7 100644
--- a/examples/do-concord.py
+++ b/examples/do-concord.py
@@ -221,7 +221,7 @@ if __name__ == "__main__":
         sys.stderr.write("    -c, --config  = the Unitex config file\n")
         sys.stderr.write("    -g, --grammar = the fst2 grammar to use\n\n")
         sys.stderr.write("Example:\n")
-        sys.stderr.write("  $ do-concord -c unitex.yaml *.txt\n")
+        sys.stderr.write("  $ do-concord -c unitex.yaml -g grammar.fst2 *.txt\n")
         sys.exit(1)
 
     try: