--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
     include_dirs=[incdir] if incdir else [],
     libraries=['libmp3lame'] if sys.platform == 'win32' else [],
     extra_objects=
-        [] if sys.platform == 'win32' or not libdir else [os.path.join(libdir, 'libmp3lame.a')],
+        [] if sys.platform == 'win32' or not libdir else [os.path.join(libdir, 'libmp3lame.so')],
     library_dirs=[libdir] if sys.platform == 'win32' and libdir else [],
     sources=['lameenc.c']
 )