diff --git a/core/leras/device.py b/core/leras/device.py
index 4d157f0..a511cab 100644
--- a/core/leras/device.py
+++ b/core/leras/device.py
@@ -87,7 +87,7 @@ class Devices(object):
         os.environ['NN_DEVICES_INITIALIZED'] = '1'
         os.environ['NN_DEVICES_COUNT'] = '0'
         
-        os.environ['CUDA_​CACHE_​MAXSIZE'] = '2147483647'
+        os.environ['CUDA_CACHE_MAXSIZE'] = '2147483647'
         min_cc = int(os.environ.get("TF_MIN_REQ_CAP", 35))
         libnames = ('libcuda.so', 'libcuda.dylib', 'nvcuda.dll')
         for libname in libnames:
@@ -205,4 +205,4 @@ if Devices.all_devices is None:
                         cuda.cuCtxDetach(context)
             Devices.all_devices = Devices(devices)
         return Devices.all_devices
-"""
\ No newline at end of file
+"""