diff --git a/set_limit.c b/set_limit.c
--- a/set_limit.c
+++ b/set_limit.c
@@ -8,7 +8,7 @@
 
 #define MINIMUM (2*1024*1024)
 
-int set_limit (int megs)
+int set_limit (unsigned long megs)
 {
     struct rlimit rlim;