diff --git a/GPUSimulators/LxF.py b/GPUSimulators/LxF.py
index 7751b30..98e54c6 100644
--- a/GPUSimulators/LxF.py
+++ b/GPUSimulators/LxF.py
@@ -24,6 +24,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 from GPUSimulators import Simulator, Common
 from GPUSimulators.Simulator import BaseSimulator, BoundaryCondition
 import numpy as np
+import ctypes
 
 #from pycuda import gpuarray
 from hip import hip,hiprtc