diff --git a/cmake/OpenCVDetectCUDA.cmake b/cmake/OpenCVDetectCUDA.cmake
index a777a466b..63644caee 100644
--- a/cmake/OpenCVDetectCUDA.cmake
+++ b/cmake/OpenCVDetectCUDA.cmake
@@ -81,7 +81,7 @@ if(CUDA_FOUND)
   
   OCV_OPTION(CUDA_FAST_MATH  "Enable --use_fast_math for CUDA compiler " OFF)
   
-  if(ENABLE_CUDA_MATH)
+  if(CUDA_FAST_MATH)
     set(CUDA_NVCC_FLAGS ${CUDA_NVCC_FLAGS} --use_fast_math)    
   endif()