diff --git a/main/utils.c b/main/utils.c
index 97abe80ae4..afddae6bf9 100644
--- a/main/utils.c
+++ b/main/utils.c
@@ -1138,8 +1138,10 @@ long int ast_random(void)
 #ifdef HAVE_DEV_URANDOM
 	if (dev_urandom_fd >= 0) {
 		int read_res = read(dev_urandom_fd, &res, sizeof(res));
-		if (read_res > 0)
-			return res < 0 ? ~res : res;
+		if (read_res > 0) {
+			res = res < 0 ? ~res : res;
+			return res % ((long)RAND_MAX + 1);
+		}
 	}
 #endif
 #ifdef linux