diff --git a/matlab/caffe/matcaffe.cpp b/matlab/caffe/matcaffe.cpp
index 0ab0b00eb..fd8397e7f 100644
--- a/matlab/caffe/matcaffe.cpp
+++ b/matlab/caffe/matcaffe.cpp
@@ -343,7 +343,7 @@ static void read_mean(MEX_ARGS) {
     }
     const string& mean_file = mxArrayToString(prhs[0]);
     Blob<float> data_mean;
-    LOG(INFO) << "Loading mean file from" << mean_file;
+    LOG(INFO) << "Loading mean file from: " << mean_file;
     BlobProto blob_proto;
     bool result = ReadProtoFromBinaryFile(mean_file.c_str(), &blob_proto);
     if (!result) {
diff --git a/src/caffe/data_transformer.cpp b/src/caffe/data_transformer.cpp
index 209dc0349..3d2c78f8e 100644
--- a/src/caffe/data_transformer.cpp
+++ b/src/caffe/data_transformer.cpp
@@ -19,7 +19,7 @@ DataTransformer<Dtype>::DataTransformer(const TransformationParameter& param)
     CHECK_EQ(param_.mean_value_size(), 0) <<
       "Cannot specify mean_file and mean_value at the same time";
     const string& mean_file = param.mean_file();
-    LOG(INFO) << "Loading mean file from" << mean_file;
+    LOG(INFO) << "Loading mean file from: " << mean_file;
     BlobProto blob_proto;
     ReadProtoFromBinaryFileOrDie(mean_file.c_str(), &blob_proto);
     data_mean_.FromProto(blob_proto);
diff --git a/src/caffe/layers/window_data_layer.cpp b/src/caffe/layers/window_data_layer.cpp
index 6287b385d..83372e074 100644
--- a/src/caffe/layers/window_data_layer.cpp
+++ b/src/caffe/layers/window_data_layer.cpp
@@ -189,7 +189,7 @@ void WindowDataLayer<Dtype>::DataLayerSetUp(const vector<Blob<Dtype>*>& bottom,
   if (has_mean_file_) {
     const string& mean_file =
           this->transform_param_.mean_file();
-    LOG(INFO) << "Loading mean file from" << mean_file;
+    LOG(INFO) << "Loading mean file from: " << mean_file;
     BlobProto blob_proto;
     ReadProtoFromBinaryFileOrDie(mean_file.c_str(), &blob_proto);
     data_mean_.FromProto(blob_proto);