diff --git a/test cases/common/103 has header symbol/meson.build b/test cases/common/103 has header symbol/meson.build
index 459049100..4f493e840 100644
--- a/test cases/common/103 has header symbol/meson.build	
+++ b/test cases/common/103 has header symbol/meson.build	
@@ -18,10 +18,8 @@ foreach comp : [cc, cpp]
   assert (not comp.has_header_symbol('stdlol.h', 'int'), 'shouldn\'t be able to find "int" with invalid header')
 endforeach
 
-# This is available on Glibc, Solaris & the BSD's, so just test for _GNU_SOURCE
-# on Linux
-if cc.has_function('ppoll') and host_machine.system() == 'linux'
-  assert (not cc.has_header_symbol('poll.h', 'ppoll'), 'ppoll should not be accessible without _GNU_SOURCE')
+# Glibc requires _GNU_SOURCE for ppoll. Other libcs do not.
+if cc.has_function('ppoll') and not cc.has_header_symbol('poll.h', 'ppoll')
   assert (cc.has_header_symbol('poll.h', 'ppoll', prefix : '#define _GNU_SOURCE'), 'ppoll should be accessible with _GNU_SOURCE')
 endif