diff --git a/opencl_fdtd/simulation.py b/opencl_fdtd/simulation.py
index 3b5e480..381047f 100644
--- a/opencl_fdtd/simulation.py
+++ b/opencl_fdtd/simulation.py
@@ -12,7 +12,7 @@ import pyopencl
 import pyopencl.array
 from pyopencl.elementwise import ElementwiseKernel
 
-from meanas import vec
+from meanas.fdmath import vec
 
 
 __author__ = 'Jan Petykiewicz'