Index: mpi4py/test/test_dl.py
===================================================================
--- mpi4py.orig/test/test_dl.py
+++ mpi4py/test/test_dl.py
@@ -15,7 +15,7 @@ class TestDL(unittest.TestCase):
         if sys.platform == 'darwin':
             libm = 'libm.dylib'
         else:
-            libm = 'libm.so'
+            libm = 'libm.so.6'
 
         handle = dl.dlopen(libm, dl.RTLD_LOCAL|dl.RTLD_LAZY)
         if handle == 0 and sys.platform.startswith('linux'):
