diff --git a/math/__init__.py b/math/__init__.py
index b2569b4..bef6244 100644
--- a/math/__init__.py
+++ b/math/__init__.py
@@ -8,8 +8,16 @@ pass
 
 import numpy
 
+
+class MathWarning(Warning):
+  """Base class for mathematics-related warnings for wpylib library.
+  """
+
+
+
 ZERO_TOL = 5.0e-16
 
+
 def ztol(val, tol=None, copy=True):
   """Rounds down values to zero if they are below tolerance."""
   if tol == None: tol = ZERO_TOL