diff --git a/include/caffe/util/device_alternate.hpp b/include/caffe/util/device_alternate.hpp
index 3df28a49ac3..1a33b947991 100644
--- a/include/caffe/util/device_alternate.hpp
+++ b/include/caffe/util/device_alternate.hpp
@@ -7,7 +7,7 @@
 
 // Stub out GPU calls as unavailable.
 
-#define NO_GPU LOG(FATAL) << "CPU-only Mode: cannot make GPU call."
+#define NO_GPU LOG(FATAL) << "Cannot make GPU call in CPU-only mode: check mode setting."
 
 #define STUB_GPU(classname) \
 template <typename Dtype> \