Format specifier in <inttypes.h> causes warning in cross-platform compatibility

I am using library <inttypes.h> (<stdint.h>) for compatibility across platforms in usigned types. When compiling on my MacOSX with -Wall options no warnings arise, while on Ubuntu 20.04 I get

mvmpi.c: In function ‘main’:
mvmpi.c:33:9: warning: format ‘%u’ expects argument of type ‘unsigned int *’, but argument 6 has type ‘uint16_t *’ {aka ‘short unsigned int *’} [-Wformat=]
   33 |         "%"PRIu32"%"PRIu32"%lf%"PRIu16, &N, &M, &L, &SN) != EOF) {
      |         ^~~                                         ~~~
      |                                                     |
      |                                                     uint16_t * {aka short unsigned int *}
In file included from stdbasic.h:33,
                 from mvmpilib.h:8,
                 from mvmpi.c:4:
/usr/include/inttypes.h:103:19: note: format string is defined here
  103 | # define PRIu16  "u"

The formatting complains about variable SN which is declared to be uint16_t variable and then it uses "%"PRIu16 format specifier, but surprisingly it appears that PRIu16 is defined in C sources libraries as unsigned int, while uint16_t would be (regularly) short unsigned int.

What is going on here? How to solve and mantain cross platform compatibility? Of course uint16_t from documentation is defined with at least 16 bits, but if the format specifier is more, then also it must be bigger in order to maintain coherence.

PRIu16 is for printing uint16_t.

You have to use SCNu16 for reading uint16_t.

Also you have to use SCNu32, not PRIu32, for reading uint32_t.