diff --git a/drivers/amlogic/media/deinterlace/flm_mod_xx.c b/drivers/amlogic/media/deinterlace/flm_mod_xx.c
index 8a6b258b0a71b2..db09e1b259bd14 100644
--- a/drivers/amlogic/media/deinterlace/flm_mod_xx.c
+++ b/drivers/amlogic/media/deinterlace/flm_mod_xx.c
@@ -311,7 +311,7 @@ int	FlmModsDet(struct sFlmDatSt *pRDat, int nDif01, int nDif02)
 					aXMI02[tT3] = aXId02[tT3];
 					nT4 += (16 - aMax02[tT3]);
 				}
-				nT4 /= nLen1;
+				nT4 /= nLen2;
 				tModLvl -= nT4;
 			} else {
 				nLen2 = -nMxMn[tT0][1];