diff --git a/meson.build b/meson.build
index be007953c8b..fa178c435a9 100644
--- a/meson.build
+++ b/meson.build
@@ -1345,12 +1345,6 @@ if dep_thread.found() and host_machine.system() != 'windows'
       args : '-D_GNU_SOURCE')
     pre_args += '-DHAVE_PTHREAD_SETAFFINITY'
   endif
-  if cc.has_function(
-      'pthread_setaffinity_np',
-      dependencies : dep_thread,
-      prefix : '#include <pthread_np.h>')
-    pre_args += '-DPTHREAD_SETAFFINITY_IN_NP_HEADER'
-  endif
 endif
 if host_machine.system() != 'windows'
   dep_expat = dependency('expat', fallback : ['expat', 'expat_dep'])