diff --git a/lib/checknullpointer.h b/lib/checknullpointer.h
index e8f02b46c..ae71a882d 100644
--- a/lib/checknullpointer.h
+++ b/lib/checknullpointer.h
@@ -63,13 +63,13 @@ public:
      * @brief parse a function call and extract information about variable usage
      * @param tok first token
      * @param var variables that the function read / write.
-	 * @param library --library files data
+     * @param library --library files data
      * @param value 0 => invalid with null pointers as parameter.
      *              non-zero => invalid with uninitialized data.
      */
     static void parseFunctionCall(const Token &tok,
                                   std::list<const Token *> &var,
-								  const Library *library,
+                                  const Library *library,
                                   unsigned char value);
 
     /**