diff --git a/hello.c b/hello.c
index 3a47ea5..9596ce5 100644
--- a/hello.c
+++ b/hello.c
@@ -1,5 +1,13 @@
 #include <stdio.h>
+#include <stdlib.h>
 
 int main(int argc, char **argv) {
-  printf("Hello world!\n");
+    
+    if (argc > 1) {
+        printf("Usage: %s\n", argv[0]);
+        exit(-1);
+    }
+    
+  printf("Hello Lambda School!\n");
 }
+