diff --git a/src/trau/trau_frame.c b/src/trau/trau_frame.c
index 0a8faf9..1159bb1 100644
--- a/src/trau/trau_frame.c
+++ b/src/trau/trau_frame.c
@@ -817,7 +817,7 @@
 			sum++;
 	}
 
-	if (sum % 1)
+	if (sum & 1)
 		return 0;
 	else
 		return 1;