diff --git a/src/coding/gsm0503_coding.c b/src/coding/gsm0503_coding.c
index 07c8c98..1ef6393 100644
--- a/src/coding/gsm0503_coding.c
+++ b/src/coding/gsm0503_coding.c
@@ -1804,7 +1804,7 @@
 	s[119] = (sum >= 2);
 	memcpy(s + 121, w + 125, 53);
 	sum = s[172] + w[178] + w[179];
-	s[172] = (sum > 2);
+	s[172] = (sum >= 2);
 	memcpy(s + 174, w + 180, 50);
 	sum = s[222] + w[230] + w[231];
 	s[222] = (sum >= 2);