diff --git a/core/src/main/java/com/scalar/db/api/ScanBuilder.java b/core/src/main/java/com/scalar/db/api/ScanBuilder.java
index 47f6166989..661e781b81 100644
--- a/core/src/main/java/com/scalar/db/api/ScanBuilder.java
+++ b/core/src/main/java/com/scalar/db/api/ScanBuilder.java
@@ -1004,21 +1004,11 @@ public static class BuildableScanFromExistingWithOngoingWhere
       implements And<BuildableScanFromExistingWithOngoingWhereAnd>,
           Or<BuildableScanFromExistingWithOngoingWhereOr> {
 
-    private BuildableScanFromExistingWithOngoingWhere(
-        BuildableScanOrScanAllFromExisting buildable) {
-      super(buildable);
-    }
-
     private BuildableScanFromExistingWithOngoingWhere(
         BuildableScanOrScanAllFromExisting buildable, ConditionalExpression condition) {
       super(buildable, condition);
     }
 
-    private BuildableScanFromExistingWithOngoingWhere(
-        BuildableScanFromExistingWithOngoingWhere buildable) {
-      super(buildable);
-    }
-
     @Override
     public BuildableScanFromExistingWithOngoingWhereAnd and(ConditionalExpression condition) {
       checkNotNull(condition);
@@ -1049,7 +1039,7 @@ public BuildableScanFromExistingWithOngoingWhereOr or(AndConditionSet andConditi
   }
 
   public static class BuildableScanFromExistingWithOngoingWhereOr
-      extends BuildableScanFromExistingWithOngoingWhere
+      extends BuildableScanFromExistingWithWhere
       implements Or<BuildableScanFromExistingWithOngoingWhereOr> {
 
     private BuildableScanFromExistingWithOngoingWhereOr(
@@ -1085,7 +1075,7 @@ public BuildableScanFromExistingWithOngoingWhereOr or(AndConditionSet andConditi
   }
 
   public static class BuildableScanFromExistingWithOngoingWhereAnd
-      extends BuildableScanFromExistingWithOngoingWhere
+      extends BuildableScanFromExistingWithWhere
       implements And<BuildableScanFromExistingWithOngoingWhereAnd> {
 
     private BuildableScanFromExistingWithOngoingWhereAnd(