Multifile project include troubleshooting

Hi everybody,

I’m writing a multifile project:

|
|
sketchbook
|
rover
|
|—brain
|—remote
|–remote.ino
|–cmds.h
|–radio_remote.h

If i put

#include <SPI.h>

in remote.ino, SPI.h is readily found, but NOT if instead, I put the same #include into radio_remote.h

Any ideas?

Best
PD. Arduino IDE 2:1.0.5 under an ubuntu 18.04 box