diff --git a/doc/fixes37.0 b/doc/fixes37.0
index 43e042d95..3f2c55378 100644
--- a/doc/fixes37.0
+++ b/doc/fixes37.0
@@ -49,6 +49,7 @@ Platform- and/or Interface-Specific New Features
 NetHack Community Patches (or Variation) Included
 -------------------------------------------------
 hallucinatory trap names from github pull request #174
+autounlock feature originally from unnethack in github pull request #228
 
 
 Code Cleanup and Reorganization
diff --git a/include/display.h b/include/display.h
index f76d9b8a0..2a2e56bae 100644
--- a/include/display.h
+++ b/include/display.h
@@ -334,7 +334,7 @@
 #define explosion_to_glyph(expltype, idx) \
     ((((expltype) * MAXEXPCHARS) + ((idx) - S_explode1)) + GLYPH_EXPLODE_OFF)
 
-#define trap_to_glyph(trap, rng)                                \
+#define trap_to_glyph(trap)                                \
     cmap_to_glyph(trap_to_defsym((trap)->ttyp))
 
 /* Not affected by hallucination.  Gives a generic body for CORPSE */