diff --git a/doc/fixes33.2 b/doc/fixes33.2
index f5a19904f..0d392f0bf 100644
--- a/doc/fixes33.2
+++ b/doc/fixes33.2
@@ -406,6 +406,8 @@ correctly handle polymorphed quest leader
 swallowing zombies/mummies whole makes you sick, like when eating them normally
 impose additional teleport restrictions on the no-teleport Plane of Air
 landmines set off by pushed boulders have same effects as stepping on them
+secret corridor detected out of vision range is still displayed (prevents bug
+	where wand of secret door detection found nothing but still identified)
 
 
 Platform- and/or Interface-Specific Fixes
diff --git a/src/detect.c b/src/detect.c
index c77c6e612..714e5d02f 100644
--- a/src/detect.c
+++ b/src/detect.c
@@ -957,10 +957,13 @@ genericptr_t num;
 
 	if(levl[zx][zy].typ == SDOOR) {
 		cvt_sdoor_to_door(&levl[zx][zy]);	/* .typ = DOOR */
+		magic_map_background(zx, zy, 0);
 		newsym(zx, zy);
 		(*(int*)num)++;
 	} else if(levl[zx][zy].typ == SCORR) {
 		levl[zx][zy].typ = CORR;
+		unblock_point(zx,zy);
+		magic_map_background(zx, zy, 0);
 		newsym(zx, zy);
 		(*(int*)num)++;
 	} else if ((ttmp = t_at(zx, zy)) != 0) {