diff --git a/expr.c b/expr.c
index 4aa2f0d..04cbee6 100644
--- a/expr.c
+++ b/expr.c
@@ -267,7 +267,7 @@ parse(char **expr, int exprlen)
 static void
 usage(void)
 {
-	eprintf("usage: %s EXPRESSION\n", argv0);
+	eprintf("usage: %s expression\n", argv0);
 }
 
 int