diff --git a/usr.sbin/crunch/crunchgen/crunched_main.c b/usr.sbin/crunch/crunchgen/crunched_main.c
index 2cf95767011..7780aa53dba 100644
--- a/usr.sbin/crunch/crunchgen/crunched_main.c
+++ b/usr.sbin/crunch/crunchgen/crunched_main.c
@@ -41,6 +41,7 @@ struct stub {
     int (*f)();
 };
 
+extern char *__progname;
 extern struct stub entry_points[];
 
 int main(int argc, char **argv, char **envp)
@@ -83,12 +84,16 @@ int crunched_here(char *path)
 
 int crunched_main(int argc, char **argv, char **envp)
 {
+    char *slash;
     struct stub *ep;
     int columns, len;
 
     if(argc <= 1)
 	crunched_usage();
 
+    slash = strrchr(argv[1], '/');
+    __progname = slash? slash+1 : argv[1];
+
     return main(--argc, ++argv, envp);
 }