diff --git a/main/src/com/google/refine/operations/cell/BlankDownOperation.java b/main/src/com/google/refine/operations/cell/BlankDownOperation.java
index 767cd102d..4ed6c4fd6 100644
--- a/main/src/com/google/refine/operations/cell/BlankDownOperation.java
+++ b/main/src/com/google/refine/operations/cell/BlankDownOperation.java
@@ -51,16 +51,12 @@ import com.google.refine.model.Project;
 import com.google.refine.model.Row;
 import com.google.refine.model.changes.CellChange;
 import com.google.refine.operations.EngineDependentMassCellOperation;
+import com.google.refine.util.ParsingUtilities;
 
 public class BlankDownOperation extends EngineDependentMassCellOperation {
     
     static public AbstractOperation reconstruct(Project project, JSONObject obj) throws Exception {
-        JSONObject engineConfig = obj.getJSONObject("engineConfig");
-        
-        return new BlankDownOperation(
-            EngineConfig.reconstruct(engineConfig),
-            obj.getString("columnName")
-        );
+        return ParsingUtilities.mapper.readValue(obj.toString(), BlankDownOperation.class);
     }
     
     @JsonCreator
diff --git a/main/src/com/google/refine/operations/cell/FillDownOperation.java b/main/src/com/google/refine/operations/cell/FillDownOperation.java
index b1b78b4d6..b672f9558 100644
--- a/main/src/com/google/refine/operations/cell/FillDownOperation.java
+++ b/main/src/com/google/refine/operations/cell/FillDownOperation.java
@@ -52,16 +52,12 @@ import com.google.refine.model.Project;
 import com.google.refine.model.Row;
 import com.google.refine.model.changes.CellChange;
 import com.google.refine.operations.EngineDependentMassCellOperation;
+import com.google.refine.util.ParsingUtilities;
 
 public class FillDownOperation extends EngineDependentMassCellOperation {
     
     static public AbstractOperation reconstruct(Project project, JSONObject obj) throws Exception {
-        JSONObject engineConfig = obj.getJSONObject("engineConfig");
-        
-        return new FillDownOperation(
-            EngineConfig.reconstruct(engineConfig),
-            obj.getString("columnName")
-        );
+        return ParsingUtilities.mapper.readValue(obj.toString(), FillDownOperation.class);
     }
     
     @JsonCreator
diff --git a/main/src/com/google/refine/operations/cell/MultiValuedCellJoinOperation.java b/main/src/com/google/refine/operations/cell/MultiValuedCellJoinOperation.java
index 112214b14..9f24bfb3d 100644
--- a/main/src/com/google/refine/operations/cell/MultiValuedCellJoinOperation.java
+++ b/main/src/com/google/refine/operations/cell/MultiValuedCellJoinOperation.java
@@ -38,6 +38,7 @@ import java.util.List;
 
 import org.json.JSONObject;
 
+import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 import com.google.refine.expr.ExpressionUtils;
@@ -48,6 +49,7 @@ import com.google.refine.model.Column;
 import com.google.refine.model.Project;
 import com.google.refine.model.Row;
 import com.google.refine.model.changes.MassRowChange;
+import com.google.refine.util.ParsingUtilities;
 
 public class MultiValuedCellJoinOperation extends AbstractOperation {
     final protected String    _columnName;
@@ -55,16 +57,16 @@ public class MultiValuedCellJoinOperation extends AbstractOperation {
     final protected String    _separator;
 
     static public AbstractOperation reconstruct(Project project, JSONObject obj) throws Exception {
-        return new MultiValuedCellJoinOperation(
-            obj.getString("columnName"),
-            obj.getString("keyColumnName"),
-            obj.getString("separator")
-        );
+        return ParsingUtilities.mapper.readValue(obj.toString(), MultiValuedCellJoinOperation.class);
     }
     
+    @JsonCreator
     public MultiValuedCellJoinOperation(
+        @JsonProperty("columnName")
         String      columnName,
+        @JsonProperty("keyColumnName")
         String      keyColumnName,
+        @JsonProperty("separator")
         String    separator
     ) {
         _columnName = columnName;