diff --git a/jshn.c b/jshn.c
index 28cfa8d..0940b5e 100644
--- a/jshn.c
+++ b/jshn.c
@@ -311,7 +311,7 @@ out:
 
 static int usage(const char *progname)
 {
-	fprintf(stderr, "Usage: %s [-n] [-i] -r <message>|-R <file>|-w\n", progname);
+	fprintf(stderr, "Usage: %s [-n] [-i] -r <message>|-R <file>|-o <file>|-p <prefix>|-w\n", progname);
 	return 2;
 }
 
diff --git a/tests/cram/test_jshn.t b/tests/cram/test_jshn.t
index d228f0e..937c7e1 100644
--- a/tests/cram/test_jshn.t
+++ b/tests/cram/test_jshn.t
@@ -6,7 +6,7 @@ set jshn for convenience:
 check usage:
 
   $ jshn
-  Usage: jshn [-n] [-i] -r <message>|-R <file>|-w
+  Usage: jshn [-n] [-i] -r <message>|-R <file>|-o <file>|-p <prefix>|-w
   [2]
 
 test bad json: