diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java
index 7b97b2c..899752d 100644
--- a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/DoubleSerializerDeserializer.java
@@ -26,7 +26,7 @@
 
     public static final DoubleSerializerDeserializer INSTANCE = new DoubleSerializerDeserializer();
 
-    protected DoubleSerializerDeserializer() {
+    private DoubleSerializerDeserializer() {
     }
 
     @Override
@@ -60,4 +60,4 @@
     }
     
     
-}
\ No newline at end of file
+}
diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/FloatSerializerDeserializer.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/FloatSerializerDeserializer.java
index 5f17c67..67e57ed 100644
--- a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/FloatSerializerDeserializer.java
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/FloatSerializerDeserializer.java
@@ -26,7 +26,7 @@
 
     public static final FloatSerializerDeserializer INSTANCE = new FloatSerializerDeserializer();
 
-    protected FloatSerializerDeserializer() {
+    private FloatSerializerDeserializer() {
     }
 
     @Override
@@ -54,4 +54,4 @@
     public static int getIntBits(byte[] bytes, int offset) {
         return IntegerSerializerDeserializer.getInt(bytes, offset);
     }
-}
\ No newline at end of file
+}
diff --git a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/IntegerSerializerDeserializer.java b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/IntegerSerializerDeserializer.java
index c2e7583..032fddf 100644
--- a/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/IntegerSerializerDeserializer.java
+++ b/hyracks-dataflow-common/src/main/java/edu/uci/ics/hyracks/dataflow/common/data/marshalling/IntegerSerializerDeserializer.java
@@ -26,7 +26,7 @@
 
     public static final IntegerSerializerDeserializer INSTANCE = new IntegerSerializerDeserializer();
 
-    protected IntegerSerializerDeserializer() {
+    private IntegerSerializerDeserializer() {
     }
 
     @Override
@@ -51,4 +51,4 @@
         return ((bytes[offset] & 0xff) << 24) + ((bytes[offset + 1] & 0xff) << 16) + ((bytes[offset + 2] & 0xff) << 8)
                 + ((bytes[offset + 3] & 0xff) << 0);
     }
-}
\ No newline at end of file
+}