diff --git a/patoolib/util.py b/patoolib/util.py
index a9b6f0c..7e6f1eb 100644
--- a/patoolib/util.py
+++ b/patoolib/util.py
@@ -575,7 +575,7 @@ def p7zip_supports_rar():
     # the subdirectory and codec name
     codecname = 'p7zip/Codecs/Rar29.so'
     # search canonical user library dirs
-    for libdir in ('/usr/lib', '/usr/local/lib'):
+    for libdir in ('/usr/lib', '/usr/local/lib', '/usr/lib64', '/usr/local/lib64', '/usr/lib/i386-linux-gnu', '/usr/lib/x86_64-linux-gnu'):
         fname = os.path.join(libdir, codecname)
         if os.path.exists(fname):
             return True