diff --git a/rdo.c b/rdo.c
index 3cfc1fa..0fb1162 100644
--- a/rdo.c
+++ b/rdo.c
@@ -34,9 +34,9 @@ int runprog(int argc, char** argv) {
 	for(int i=0; i<argc; i++)
 		argv[i] = argv[i + 1];
 
-	if (setuid(0) == -1)
+	if (setuid(0) < 0)
 		err(1, "Could not setuid");
-	if (setgid(0) == -1)
+	if (setgid(0) < 0)
 		err(1, "Could not setgid");
 
 	if (execvp(argv[0], argv) != 0)