--- a/mfbt/Char16.h
+++ b/mfbt/Char16.h
@@ -61,18 +61,18 @@
    */
 class char16ptr_t
 {
   private:
     const char16_t* ptr;
     static_assert(sizeof(char16_t) == sizeof(wchar_t), "char16_t and wchar_t sizes differ");
 
   public:
-    char16ptr_t(const char16_t* ptr) : ptr(ptr) {}
-    char16ptr_t(const wchar_t* ptr) : ptr(reinterpret_cast<const char16_t*>(ptr)) {}
+    char16ptr_t(const char16_t* p) : ptr(p) {}
+    char16ptr_t(const wchar_t* p) : ptr(reinterpret_cast<const char16_t*>(p)) {}
 
     /* Without this, nullptr assignment would be ambiguous. */
     constexpr char16ptr_t(decltype(nullptr)) : ptr(nullptr) {}
 
     operator const char16_t*() const {
       return ptr;
     }
     operator const wchar_t*() const {