diff --git a/src/load_map.cpp b/src/load_map.cpp
index a87f37e00..a6a47400c 100644
--- a/src/load_map.cpp
+++ b/src/load_map.cpp
@@ -495,6 +495,13 @@ void map_parser::parse_fontset(Map & map, xml_node const& node)
                 {
                     success = true;
                 }
+                else
+                {
+                    // https://github.com/mapnik/mapnik/issues/1791
+                    MAPNIK_LOG_ERROR(fontset) << "warning: unable to find face-name '"
+                                              << n.get_attr<std::string>("face-name","")
+                                              << "' in FontSet '" << fontset.get_name() << "'";
+                }
             }
         }