diff --git a/src/security/validation-request.hpp b/src/security/validation-request.hpp
index f64082b..0bc0d59 100644
--- a/src/security/validation-request.hpp
+++ b/src/security/validation-request.hpp
@@ -16,7 +16,7 @@
  * An OnVerified function object is used to pass a callback to report a successful Interest validation.
  */
 typedef function< void (const shared_ptr<const Interest>&) > OnInterestValidated;
-  
+
 /**
  * An OnVerifyFailed function object is used to pass a callback to report a failed Interest validation.
  */
@@ -26,7 +26,7 @@
  * An OnVerified function object is used to pass a callback to report a successful Data validation.
  */
 typedef function< void (const shared_ptr<const Data>&) > OnDataValidated;
-  
+
 /**
  * An OnVerifyFailed function object is used to pass a callback to report a failed Data validation.
  */
@@ -35,9 +35,9 @@
 
 class ValidationRequest {
 public:
-  ValidationRequest(const Interest &interest, 
-                    const OnDataValidated &onValidated, 
-                    const OnDataValidationFailed &onDataValidated, 
+  ValidationRequest(const Interest& interest,
+                    const OnDataValidated& onValidated,
+                    const OnDataValidationFailed& onDataValidated,
                     int retry, int stepCount)
   : m_interest(interest)
   , m_onValidated(onValidated)
@@ -45,7 +45,7 @@
   , m_retry(retry)
   , m_stepCount(stepCount)
   {}
-    
+
   virtual
   ~ValidationRequest() {}