diff --git a/src/save_map.cpp b/src/save_map.cpp
index 6ddd32b06..b5ef6e4c0 100644
--- a/src/save_map.cpp
+++ b/src/save_map.cpp
@@ -542,12 +542,12 @@ void serialize_layer( ptree & map_node, layer const& lyr, bool explicit_defaults
 
     if ( lyr.minimum_scale_denominator() != 0 || explicit_defaults )
     {
-        set_attr( layer_node, "minimum_scale_denominator", lyr.minimum_scale_denominator() );
+        set_attr( layer_node, "minimum-scale-denominator", lyr.minimum_scale_denominator() );
     }
 
     if ( lyr.maximum_scale_denominator() != std::numeric_limits<double>::max() || explicit_defaults )
     {
-        set_attr( layer_node, "maximum_scale_denominator", lyr.maximum_scale_denominator() );
+        set_attr( layer_node, "maximum-scale-denominator", lyr.maximum_scale_denominator() );
     }
 
     if ( lyr.queryable() || explicit_defaults )
diff --git a/test/data b/test/data
index a44457cc0..0c278955e 160000
--- a/test/data
+++ b/test/data
@@ -1 +1 @@
-Subproject commit a44457cc063249e0d204cde7249d37706bf8844c
+Subproject commit 0c278955e867f9b88abb6bcd5a2aa3ee76e870c1