diff --git a/src/register/prdfScomRegisterAccess.H b/src/register/prdfScomRegisterAccess.H
index 672ddc3..e302583 100644
--- a/src/register/prdfScomRegisterAccess.H
+++ b/src/register/prdfScomRegisterAccess.H
@@ -65,7 +65,7 @@
     /**
      * @brief     constructor
      */
-    ScomRegisterAccess():HardwareRegister( ),iv_containerChip ( NULL ){ };
+    ScomRegisterAccess():HardwareRegister( ),iv_containerChip ( nullptr ){ };
 
     /**
      * @brief Destructor