--- sympy-sympy-1.0/sympy/plotting/plot.py.orig	2016-03-08 11:35:33.000000000 -0700
+++ sympy-sympy-1.0/sympy/plotting/plot.py	2017-01-16 17:27:38.093969621 -0700
@@ -383,7 +383,7 @@ class Line2DBaseSeries(BaseSeries):
         np = import_module('numpy')
         c = self.line_color
         if hasattr(c, '__call__'):
-            f = np.vectorize(c)
+            f = np.vectorize(c, [np.float64])
             arity = len(getargspec(c)[0])
             if arity == 1 and self.is_parametric:
                 x = self.get_parameter_points()
@@ -700,7 +700,7 @@ class SurfaceBaseSeries(BaseSeries):
         np = import_module('numpy')
         c = self.surface_color
         if isinstance(c, Callable):
-            f = np.vectorize(c)
+            f = np.vectorize(c, [np.float64])
             arity = len(getargspec(c)[0])
             if self.is_parametric:
                 variables = list(map(centers_of_faces, self.get_parameter_meshes()))