diff --git a/kintex7/segbits_hclk_ioi.db b/kintex7/segbits_hclk_ioi.db
index 59f8754..231f481 100644
--- a/kintex7/segbits_hclk_ioi.db
+++ b/kintex7/segbits_hclk_ioi.db
@@ -246,3 +246,4 @@ HCLK_IOI.VREF.V_600_MV 40_19 40_27
 HCLK_IOI.VREF.V_675_MV 40_19 40_28
 HCLK_IOI.VREF.V_750_MV 40_19 40_26
 HCLK_IOI.VREF.V_900_MV 40_19 40_25
+HCLK_IOI.ONLY_DIFF_IN_USE 40_31 41_15 41_30