diff --git a/src/main/kotlin/mdnet/base/server/ImageServer.kt b/src/main/kotlin/mdnet/base/server/ImageServer.kt
index 7208a1a..8466cb7 100644
--- a/src/main/kotlin/mdnet/base/server/ImageServer.kt
+++ b/src/main/kotlin/mdnet/base/server/ImageServer.kt
@@ -234,7 +234,7 @@ class ImageServer(
         contentType!!
 
         if (!contentType.isImage()) {
-            LOGGER.trace { "Upstream query for $sanitizedUri returned bad mime-type" }
+            LOGGER.trace { "Upstream query for $sanitizedUri returned bad mime-type $contentType" }
             mdResponse.close()
             return Response(mdResponse.status)
         }