diff --git a/Eigen/Core b/Eigen/Core
index d8f62c825..5d0a3e785 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -57,6 +57,8 @@
   #define EIGEN_NO_DEBUG
   // All functions callable from CUDA code must be qualified with __device__
   #define EIGEN_DEVICE_FUNC __host__ __device__
+#else
+  #define EIGEN_DEVICE_FUNC
 #endif
 
 #ifndef EIGEN_DONT_VECTORIZE