diff --git a/meson.build b/meson.build
index e5096bf..51c289f 100644
--- a/meson.build
+++ b/meson.build
@@ -268,7 +268,7 @@ sh = find_program('sh', required : false)
 
 if not sh.found() # host_machine.system() == 'windows' or not sh.found()
   # TODO: This is not always correct
-  if cc.get_id() == 'msvc'
+  if host_machine.system() == 'windows'
     gperf_len_type = 'size_t'
   else
     gperf_len_type = 'unsigned'