diff --git a/src/runtime/runtime_rp2040.go b/src/runtime/runtime_rp2040.go
index 8a8c343c5..fa048117b 100644
--- a/src/runtime/runtime_rp2040.go
+++ b/src/runtime/runtime_rp2040.go
@@ -31,7 +31,7 @@ func nanosecondsToTicks(ns int64) timeUnit {
 }
 
 func sleepTicks(d timeUnit) {
-	if d == 0 {
+	if d <= 0 {
 		return
 	}