diff --git a/openbr/openbr_plugin.cpp b/openbr/openbr_plugin.cpp
index 6f2717a..f50fcee 100644
--- a/openbr/openbr_plugin.cpp
+++ b/openbr/openbr_plugin.cpp
@@ -1393,7 +1393,7 @@ float compare(const Template &a, const Template &b) const
 
 float compare(const cv::Mat &, const cv::Mat &) const
 {
-    qFatal("Logic error: distance metric did not implement a comparison function or was accessed at an unsupported level of abstraction.");
+    qFatal("Logic error: %s did not implement a comparison function or was accessed at an unsupported level of abstraction.", metaObject()->className());
 }
 
 /* Distance - private methods */
diff --git a/openbr/plugins/distance.cpp b/openbr/plugins/distance.cpp
index ca90b3f..214be02 100644
--- a/openbr/plugins/distance.cpp
+++ b/openbr/plugins/distance.cpp
@@ -169,7 +169,7 @@ class PipeDistance : public Distance
         futures.waitForFinished();
     }
 
-    float compare(const Mat &a, const Mat &b) const
+    float compare(const Template &a, const Template &b) const
     {
         float result = -std::numeric_limits<float>::max();
         foreach (br::Distance *distance, distances) {