1 files changed, 1 insertions, 1 deletions
diff --git a/options.c b/options.c
index f4a551b..4f8df71 100644
--- a/options.c
+++ b/options.c
@@ -55,7 +55,7 @@ static void usage(const char *argv0, int verbose)
 	printf("\tpad             = entity, ':', pad number ;\n");
 	printf("\tentity          = entity number | ( '\"', entity name, '\"' ) ;\n");
 	printf("\tsize            = width, 'x', height ;\n");
-	printf("\tcrop            = left, ',', top, '/', size ;\n");
+	printf("\tcrop            = '(', left, ',', top, ')', '/', size ;\n");
 	printf("\tframe interval  = numerator, '/', denominator ;\n");
 	printf("where the fields are\n");
 	printf("\tentity number   Entity numeric identifier\n");