diff --git a/util/ranger/detacher.go b/util/ranger/detacher.go
index 65535f691f439..6d9b036f7200c 100644
--- a/util/ranger/detacher.go
+++ b/util/ranger/detacher.go
@@ -533,8 +533,7 @@ func ExtractEqAndInCondition(sctx sessionctx.Context, conditions []expression.Ex
 			mergedAccesses[offset] = accesses[offset]
 			points[offset] = rb.build(accesses[offset])
 		}
-		_, col := cond.CharsetAndCollation()
-		points[offset] = rb.intersection(points[offset], rb.build(cond), collate.GetCollator(col))
+		points[offset] = rb.intersection(points[offset], rb.build(cond), collate.GetCollator(cols[offset].GetType().Collate))
 		if len(points[offset]) == 0 { // Early termination if false expression found
 			if expression.MaybeOverOptimized4PlanCache(sctx, conditions) {
 				// cannot return an empty-range for plan-cache since the range may become non-empty as parameters change