diff --git a/src/core/model/command-line.cc b/src/core/model/command-line.cc
index fd30e2382..024e37d1d 100644
--- a/src/core/model/command-line.cc
+++ b/src/core/model/command-line.cc
@@ -858,12 +858,12 @@ CommandLineHelper::GetDefault<bool>(const bool& val)
 
 template <>
 bool
-CommandLineHelper::UserItemParse<bool>(const std::string& value, bool& val)
+CommandLineHelper::UserItemParse<bool>(const std::string& value, bool& dest)
 {
     // No new value, so just toggle it
     if (value.empty())
     {
-        val = !val;
+        dest = !dest;
         return true;
     }
 
@@ -873,19 +873,19 @@ CommandLineHelper::UserItemParse<bool>(const std::string& value, bool& val)
     });
     if (src == "true" || src == "t")
     {
-        val = true;
+        dest = true;
         return true;
     }
     else if (src == "false" || src == "f")
     {
-        val = false;
+        dest = false;
         return true;
     }
     else
     {
         std::istringstream iss;
         iss.str(src);
-        iss >> val;
+        iss >> dest;
         return !iss.bad() && !iss.fail();
     }
 }
@@ -901,32 +901,32 @@ CommandLineHelper::GetDefault<Time>(const Time& val)
 
 template <>
 bool
-CommandLineHelper::UserItemParse<uint8_t>(const std::string& value, uint8_t& val)
+CommandLineHelper::UserItemParse<uint8_t>(const std::string& value, uint8_t& dest)
 {
-    uint8_t oldVal = val;
-    int newVal;
+    uint8_t oldDest = dest;
+    int newDest;
 
     try
     {
-        newVal = std::stoi(value);
+        newDest = std::stoi(value);
     }
     catch (std::invalid_argument& ia)
     {
         NS_LOG_WARN("invalid argument: " << ia.what());
-        val = oldVal;
+        dest = oldDest;
         return false;
     }
     catch (std::out_of_range& oor)
     {
         NS_LOG_WARN("out of range: " << oor.what());
-        val = oldVal;
+        dest = oldDest;
         return false;
     }
-    if (newVal < 0 || newVal > 255)
+    if (newDest < 0 || newDest > 255)
     {
         return false;
     }
-    val = newVal;
+    dest = newDest;
     return true;
 }
 
diff --git a/src/core/model/command-line.h b/src/core/model/command-line.h
index 313fc797a..371250163 100644
--- a/src/core/model/command-line.h
+++ b/src/core/model/command-line.h
@@ -642,31 +642,31 @@ namespace CommandLineHelper
  * \brief Helpers to specialize CommandLine::UserItem::Parse()
  *
  * \param [in] value The argument name
- * \param [out] val The argument location
+ * \param [out] dest The argument location
  * \tparam T \deduced The type being specialized
  * \return \c true if parsing was successful
  */
 template <typename T>
-bool UserItemParse(const std::string& value, T& val);
+bool UserItemParse(const std::string& value, T& dest);
 /**
  * \brief Specialization of CommandLine::UserItem::Parse() to \c bool
  *
  * \param [in] value The argument name
- * \param [out] val The boolean variable to set
+ * \param [out] dest The boolean variable to set
  * \return \c true if parsing was successful
  */
 template <>
-bool UserItemParse<bool>(const std::string& value, bool& val);
+bool UserItemParse<bool>(const std::string& value, bool& dest);
 /**
  * \brief Specialization of CommandLine::UserItem::Parse() to \c uint8_t
  * to distinguish from \c char
  *
  * \param [in] value The argument name
- * \param [out] val The \c uint8_t variable to set
+ * \param [out] dest The \c uint8_t variable to set
  * \return \c true if parsing was successful
  */
 template <>
-bool UserItemParse<uint8_t>(const std::string& value, uint8_t& val);
+bool UserItemParse<uint8_t>(const std::string& value, uint8_t& dest);
 
 /**
  * \ingroup commandlinehelper
@@ -760,11 +760,11 @@ CommandLine::UserItem<T>::Parse(const std::string& value) const
 
 template <typename T>
 bool
-CommandLineHelper::UserItemParse(const std::string& value, T& val)
+CommandLineHelper::UserItemParse(const std::string& value, T& dest)
 {
     std::istringstream iss;
     iss.str(value);
-    iss >> val;
+    iss >> dest;
     return !iss.bad() && !iss.fail();
 }