isup: Fix the lebgth check in this packet

1 files changed, 1 insertions, 1 deletions

diff --git a/src/isup.c b/src/isup.c
index 6e9e359..d57cb7a 100644
--- a/src/isup.c
+++ b/src/isup.c
@@ -67,7 +67,7 @@ int isup_parse_grs(const uint8_t *data, uint8_t in_length)
 	uint8_t ptr;
 	uint8_t length;
 
-	if (in_length > 3) {
+	if (in_length < 3) {
 		LOGP(DISUP, LOGL_ERROR, "This needs three bytes.\n");
 		return -1;	
 	}