The problem is that `.h` is an extension used for multiple filetypes in the real world and I have my personal feelings about this [expletive deleted] insanity, thats what `.hpp` is for, but anyway the world is what it is and `.h` is used for C, C++ and others.

Because C++ is a superset of C, and C++ has rather more in the "header" files than C does usually, C++ headers need to be C++, they rarely highlight or parse well if treated as C. But C ones will still pretty much parse and highlight correctly if treated as C++. So it was decided that making the setting for `.h` C++ will be mostly ok for C contents too. So the default setting in `filetype_extensions.conf` put `*.h` on C++. And because C++ is before any other filetype that also uses `*.h` the C++ setting overrides those settings which are after it.

And since Geany has a mix of C and C++ with both using `.h` for header, then of course the default settings must suit Geany :stuck_out_tongue_winking_eye:.

Your options for using `.h` are:

1. if you only use C but no C++ then in `filetype_extensions.conf` add `.h` to C 2. add your snipets to both C and C++ 3. add `// -*- C -*-` to your C headers so they are explicit independent of the extension