diff --git a/GPUSimulators/CudaContext.py b/GPUSimulators/CudaContext.py
index 1760948..36b34db 100644
--- a/GPUSimulators/CudaContext.py
+++ b/GPUSimulators/CudaContext.py
@@ -221,7 +221,7 @@ class CudaContext(object):
         options_hash = options_hasher.hexdigest()
         
         # Create hash of kernel souce
-        source_hash = CudaContext.hash_kernel( \
+        source_hash = self.hash_kernel( \
                     kernel_path, \
                     include_dirs=[self.module_path] + include_dirs)