diff --git a/dat/symbols b/dat/symbols
index 9c9308c26..4e308a0e2 100644
--- a/dat/symbols
+++ b/dat/symbols
@@ -198,7 +198,7 @@ start: RogueEpyx
 	S_armor: \x0a			# Vert rect with o
 	S_ring: \x09			# circle with arrow
 	S_amulet: \x0c			# "female" symbol
-	S_food: \x05			# club (as in cards)			
+	S_food: \x05			# club (as in cards)
 	S_potion: \xad			# upside down '!'
 	S_scroll: \x0e			# musical note
 	S_wand: \xe7			# greek tau
@@ -394,3 +394,15 @@ start: NHAccess
 	S_explode9: \047
 finish
 
+start: plain
+	Description: Same as Default symbols, except '+' for corner walls
+	S_tlcorn: '+'
+	S_trcorn: '+'
+	S_blcorn: '+'
+	S_brcorn: '+'
+	S_crwall: '+'
+	S_tuwall: '+'
+	S_tdwall: '+'
+	S_tlwall: '+'
+	S_trwall: '+'
+finish #plain -- other symbols implicitly retain their default values
diff --git a/doc/fixes36.1 b/doc/fixes36.1
index 416b3889b..2225af5ef 100644
--- a/doc/fixes36.1
+++ b/doc/fixes36.1
@@ -281,6 +281,7 @@ REPRODUCIBLE_BUILD is new config.h setting to fetch build date+time from
 	could duplicate the original (disabled by default; tested for Unix)
 default value for vibrating square symbol changed from yellow '^' to purple '~'
 allow symbol set values to be specified via char within single quotes
+add symbols set "plain", same as default except it uses '+' for corner walls
 
 
 Platform- and/or Interface-Specific New Features