diff --git a/tex/generic/pgf/graphdrawing/lua/pgf/gd/pedigrees/Koerner2015.lua b/tex/generic/pgf/graphdrawing/lua/pgf/gd/pedigrees/Koerner2015.lua
index 32927530a..1736df2d7 100644
--- a/tex/generic/pgf/graphdrawing/lua/pgf/gd/pedigrees/Koerner2015.lua
+++ b/tex/generic/pgf/graphdrawing/lua/pgf/gd/pedigrees/Koerner2015.lua
@@ -73,16 +73,19 @@ declare {
   documentation = [["
       ...
   "]],
-  examples = [["
-    \tikz \graph [simple pedigree layout, default edge operator=complete bipartite]
-    {
-      Eve -- [mate] Felix;
-      { Eve, Felix } -> [child] { George, Hank };
-
-      Alice -- [mate] Bob;
-      { Alice, Bob } -> [child] { Charly, Dave, Eve };
-    };
-  "]]
+  examples = {
+    options = [[ preamble=\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{pedigrees} ]],
+    [[
+      \tikz \graph [simple pedigree layout, default edge operator=complete bipartite]
+      {
+        Eve -- [mate] Felix;
+        { Eve, Felix } -> [child] { George, Hank };
+
+        Alice -- [mate] Bob;
+        { Alice, Bob } -> [child] { Charly, Dave, Eve };
+      };
+    ]]
+  }
 }