diff --git a/tape/types.go b/tape/types.go
index db2c852..32a2e59 100644
--- a/tape/types.go
+++ b/tape/types.go
@@ -303,7 +303,7 @@ func I64ArraySize[T Int64](value []T) (int, error) {
 // U16CastSafe safely casts an integer to a uint16. If an overflow or underflow
 // occurs, it will return (0, false).
 func U16CastSafe(n int) (uint16, bool) {
-	if n < uint16Max && n > 0 {
+	if n < uint16Max && n >= 0 {
 		return uint16(n), true
 	} else {
 		return 0, false