C Program: newbie trying to pass 2D string array into a function

Programming in C ( with -std=C89), and running into errors trying to pass a character string array into a function.

In main(), I've declared the array as follows:

#define ROWS 501
 #define COLS 101
 void my_function( char **);
 ...
 char my_array[ROWS][COLS];
 ...
 my_function(my_array);
 

In my_function, I've declared the array as:

void my_function( char **my_array )
 {
 ...
 }
 

I'm getting this error:

warning: passing argument 1 of 'my_function' from incompatible pointer type,
note: expected 'char **' but argument is of type 'char (*)[101]

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