diff --git a/setup.py b/setup.py
index 04305de..f424dac 100644
--- a/setup.py
+++ b/setup.py
@@ -972,7 +972,8 @@
             exts.append( Extension('resource', ['resource.c']) )
 
             # Sun yellow pages. Some systems have the functions in libc.
-            if platform not in ['cygwin', 'qnx6'] and find_file('rpcsvc/yp_prot.h', inc_dirs, []) is not None:
+            if (platform not in ['cygwin', 'qnx6'] and
+                find_file('rpcsvc/yp_prot.h', inc_dirs, []) is not None):
                 if (self.compiler_obj.find_library_file(lib_dirs, 'nsl')):
                     libs = ['nsl']
                 else: