diff -rup groff-1.18.1.4/src/roff/troff/node.cc groff-1.18.1.4.test/src/roff/troff/node.cc
--- groff-1.18.1.4/src/roff/troff/node.cc	2010-06-28 12:11:58.511549052 +0200
+++ groff-1.18.1.4.test/src/roff/troff/node.cc	2010-06-28 18:34:45.651674069 +0200
@@ -4625,7 +4625,7 @@ node *make_node(charinfo *ci, environmen
   case charinfo::TRANSLATE_DUMMY:
     return new dummy_node;
   case charinfo::TRANSLATE_HYPHEN_INDICATOR:
-    error("translation to \\% ignored in this context");
+    error("translation to \\%% ignored in this context");
     break;
   }
   charinfo *tem = ci->get_translation();