diff --git a/codec/h264/lex.go b/codec/h264/lex.go
index 07c9acc1..1e8e7ecb 100644
--- a/codec/h264/lex.go
+++ b/codec/h264/lex.go
@@ -204,7 +204,7 @@ func (l *RTPLexer) Lex(dst io.Writer, src io.Reader, delay time.Duration) error
 			continue
 		}
 
-		if nalType >= typeSingleNALULowBound && nalType <= typeSingleNALUHighBound {
+		if typeSingleNALULowBound <= nalType && nalType <= typeSingleNALUHighBound {
 			l.writeWithPrefix(payload)
 		} else {
 			switch nalType {