diff --git a/cmake/FindCUDNN.cmake b/cmake/FindCUDNN.cmake
index 195781b957..df64db39e6 100644
--- a/cmake/FindCUDNN.cmake
+++ b/cmake/FindCUDNN.cmake
@@ -78,12 +78,7 @@ if(CUDNN_INCLUDE_DIR)
   string(REGEX MATCH "define CUDNN_PATCHLEVEL ([0-9]+)" _ "${CUDNN_H_CONTENTS}")
   set(CUDNN_VERSION_PATCH ${CMAKE_MATCH_1} CACHE INTERNAL "")
 
-  set(CUDNN_VERSION
-    "${CUDNN_VERSION_MAJOR}.${CUDNN_VERSION_MINOR}.${CUDNN_VERSION_PATCH}"
-    CACHE
-    STRING
-    "cuDNN version"
-  )
+  set(CUDNN_VERSION "${CUDNN_VERSION_MAJOR}.${CUDNN_VERSION_MINOR}.${CUDNN_VERSION_PATCH}")
 
   unset(CUDNN_H_CONTENTS)
 endif()