diff --git a/inc/hgl/io/DataInputStream.h b/inc/hgl/io/DataInputStream.h
index b190c44..b9bc4c5 100644
--- a/inc/hgl/io/DataInputStream.h
+++ b/inc/hgl/io/DataInputStream.h
@@ -26,9 +26,7 @@ namespace hgl
                 in=is;
             }
 
-            virtual ~DataInputStream()
-            {
-            }
+            virtual ~DataInputStream()=default;
 
             virtual void Use(InputStream *is)
             {
diff --git a/inc/hgl/io/DataOutputStream.h b/inc/hgl/io/DataOutputStream.h
index 6a3dd66..972eb04 100644
--- a/inc/hgl/io/DataOutputStream.h
+++ b/inc/hgl/io/DataOutputStream.h
@@ -27,9 +27,7 @@ namespace hgl
                 out=os;
             }
 
-            virtual ~DataOutputStream()
-            {
-            }
+            virtual ~DataOutputStream()=default;
 
             virtual void Use(OutputStream *os)
             {
diff --git a/inc/hgl/io/EndianDataOutputStream.h b/inc/hgl/io/EndianDataOutputStream.h
index fda089e..445ded5 100644
--- a/inc/hgl/io/EndianDataOutputStream.h
+++ b/inc/hgl/io/EndianDataOutputStream.h
@@ -15,9 +15,7 @@ namespace hgl
             {
             }
 
-            virtual ~DirectDataOutputStream()
-            {
-            }
+            virtual ~DirectDataOutputStream()=default;
 
             #define STREAM_DIRECT_WRITE(type,name)  virtual bool Write##name(const type &value) \
                                                     {   \