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-rw-r--r--ext/fiddle/extconf.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/fiddle/extconf.rb b/ext/fiddle/extconf.rb
index e2e1ea6d16..c80a1f9a83 100644
--- a/ext/fiddle/extconf.rb
+++ b/ext/fiddle/extconf.rb
@@ -4,7 +4,7 @@ require 'mkmf'
dir_config 'libffi'
-unless pkg_config("libffi") and have_header('ffi.h')
+unless pkg_config("libffi") or have_header('ffi.h')
if have_header('ffi/ffi.h')
$defs.push(format('-DUSE_HEADER_HACKS'))
else