diff --git a/GPUSimulators/KP07_dimsplit.py b/GPUSimulators/KP07_dimsplit.py
index d6a9efd..0a5cfc7 100644
--- a/GPUSimulators/KP07_dimsplit.py
+++ b/GPUSimulators/KP07_dimsplit.py
@@ -28,6 +28,7 @@ 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