diff --git a/src/fmri/LayerInfo.cpp b/src/fmri/LayerInfo.cpp
index 63a2844..bc041c8 100644
--- a/src/fmri/LayerInfo.cpp
+++ b/src/fmri/LayerInfo.cpp
@@ -49,14 +49,22 @@ const std::vector<boost::shared_ptr<caffe::Blob<DType>>>& LayerInfo::parameters(
 
 std::ostream &fmri::operator<<(std::ostream &out, LayerInfo::Type type)
 {
-    for (auto i : LayerInfo::NAME_TYPE_MAP) {
-        if (i.second == type) {
-            out << i.first;
-            return out;
+    return out << LayerInfo::nameByType(type);
+}
+
+std::string_view LayerInfo::nameByType(LayerInfo::Type type)
+{
+    static std::unordered_map<Type, std::string_view> typeMap;
+    if (typeMap.empty()) {
+        for (auto item : LayerInfo::NAME_TYPE_MAP) {
+            typeMap[item.second] = item.first;
         }
     }
 
-    out << "ERROR! UNSUPPORTED TYPE";
-    return out;
+    try {
+        return typeMap.at(type);
+    } catch (std::out_of_range&) {
+        return "ERROR! UNSUPPORTED TYPE";
+    }
 }
 
diff --git a/src/fmri/LayerInfo.hpp b/src/fmri/LayerInfo.hpp
index 7a065f5..903cf1e 100644
--- a/src/fmri/LayerInfo.hpp
+++ b/src/fmri/LayerInfo.hpp
@@ -32,8 +32,7 @@ namespace fmri
         const std::vector<boost::shared_ptr<caffe::Blob<DType>>>& parameters() const;
 
         static Type typeByName(std::string_view name);
-
-        friend std::ostream& operator<<(std::ostream& out, Type type);
+        static std::string_view nameByType(Type type);
 
     private:
         std::vector<boost::shared_ptr<caffe::Blob<DType>>> parameters_;
diff --git a/src/fmri/main.cpp b/src/fmri/main.cpp
index 0365c95..9780636 100644
--- a/src/fmri/main.cpp
+++ b/src/fmri/main.cpp
@@ -109,7 +109,10 @@ static void renderLayerName(const LayerData &data)
 {
     // Draw the name of the layer for reference.
     glColor3f(0.5, 0.5, 0.5);
-    renderText(data.name());
+    auto layerName = data.name();
+    layerName += ": ";
+    layerName += LayerInfo::nameByType(rendererData.layerInfo.at(data.name()).type());
+    renderText(layerName);
 
     glTranslatef(0, 0, -10);
 }