diff --git a/lib/stdlib.ngs b/lib/stdlib.ngs
index daf474e6..89f9fe27 100644
--- a/lib/stdlib.ngs
+++ b/lib/stdlib.ngs
@@ -8030,8 +8030,8 @@ section "retry() and friends" {
 		fail_cb={throw RetryFail()},
 		body:Fun={throw RetryBodyMissing("'body' argument missing in retry()")}
 	) {
-		guard sleep =~ AnyOf(Int, Iter)
-		sleep_iter = if sleep is Int then ConstIter(sleep) else sleep
+		guard sleep =~ AnyOf(Num, Iter)  # Can't move to parameters as Iter is not defined at this point
+		sleep_iter = if sleep is Num then ConstIter(sleep) else sleep
 		result = null  # otherwise it will be local to try { ... }
 		for(i;times) {
 			n = i + 1