diff -up allegro-4.4.2/include/allegro/alcompat.h~ allegro-4.4.2/include/allegro/alcompat.h
--- allegro-4.4.2/include/allegro/alcompat.h~	2009-12-20 02:10:56.000000000 +0100
+++ allegro-4.4.2/include/allegro/alcompat.h	2018-05-29 12:57:32.182913729 +0200
@@ -40,7 +40,7 @@
       #endif
    #endif
 
-   #ifndef ALLEGRO_NO_FIX_ALIASES
+   #ifdef ALLEGRO_FIX_ALIASES
       AL_ALIAS(fixed fadd(fixed x, fixed y), fixadd(x, y))
       AL_ALIAS(fixed fsub(fixed x, fixed y), fixsub(x, y))
       AL_ALIAS(fixed fmul(fixed x, fixed y), fixmul(x, y))