diff --git a/src/main.cpp b/src/main.cpp
index 46d0453..d5a80d1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -14,9 +14,15 @@
 #include <libscnumerics.hpp>
 
 void print_help() {
-    std::cout << "usage: pw [-h|--version]\n";
-    std::cout << "  -h, --help    show this help text and exit\n";
-    std::cout << "  --version     show version number and exit\n";
+    std::cout << "usage: pw [-h|--version] [-c <len>] [-d] [-l] [-u] [-s]\n";
+    std::cout << "  -h, --help         show this help text and exit\n";
+    std::cout << "  --version          show version number and exit\n";
+    std::cout << "  -c, --count <num>  password length; default is 24 characters\n";
+    std::cout << "  -d, --digit        allow digits\n";
+    std::cout << "  -l, --lower        allow lower case letters\n";
+    std::cout << "  -u, --upper        allow upper case letters\n";
+    std::cout << "  -s, --symbol       allow symbols and punctuation\n";
+    std::cout << "When none of -d, -l, -u, and -s are given, pw acts as if all had been specified.\n";
 }
 
 void print_version() {