C++11 char array intializations

In C++11, char pointers cannot be initialized to string literals directly.
In earlier versions of C++, I could do this with no issue.

If code below is allowed,

char arr[] = "Hello";
char *p_str1 = arr;  //allowed

Then why the code below is not allowed?

char *p_str3 = "Hello"; //Not allowed

Note: I am aware adding const would fix. But need to know reasons.