diff --git a/fork1.c b/fork1.c
index f65af7a..0cb9150 100644
--- a/fork1.c
+++ b/fork1.c
@@ -6,7 +6,7 @@
 #define FAILURE -1
 
 int
-main()
+main(int argc, const char** argv)
 {
     if (argc != 0) {
         fprintf(stdout, "Program %s takes no parameters.\n", argv[0]);