diff -uNr nethack-3.4.3/src/do.c nethack-3.4.3.mod/src/do.c
--- nethack-3.4.3/src/do.c	2003-12-08 00:39:13.000000000 +0100
+++ nethack-3.4.3.mod/src/do.c	2009-02-01 14:08:56.000000000 +0100
@@ -389,6 +389,9 @@
 		case RIN_POLYMORPH_CONTROL:
 	pline_The("sink momentarily looks like a regularly erupting geyser.");
 		    break;
+		case RIN_CLAIRVOYANCE:
+				You("see the sink from all sides.");
+				break;
 	    }
 	}
 	if(ideed)
diff -uNr nethack-3.4.3/src/do_wear.c nethack-3.4.3.mod/src/do_wear.c
--- nethack-3.4.3/src/do_wear.c	2003-12-08 00:39:13.000000000 +0100
+++ nethack-3.4.3.mod/src/do_wear.c	2009-02-01 14:11:53.000000000 +0100
@@ -710,6 +710,7 @@
 	case RIN_FREE_ACTION:                
 	case RIN_SLOW_DIGESTION:
 	case RIN_SUSTAIN_ABILITY:
+  case RIN_CLAIRVOYANCE:
 	case MEAT_RING:
 		break;
 	case RIN_WARNING:
diff -uNr nethack-3.4.3/src/objects.c nethack-3.4.3.mod/src/objects.c
--- nethack-3.4.3/src/objects.c	2003-12-08 00:39:13.000000000 +0100
+++ nethack-3.4.3.mod/src/objects.c	2009-02-01 14:06:11.000000000 +0100
@@ -496,6 +496,8 @@
 		OBJ(name,stone), \
 		BITS(0,0,spec,0,mgc,spec,0,0,0,HARDGEM(mohs),0,P_NONE,metal), \
 		power, RING_CLASS, 0, 0, 3, cost, 0, 0, 0, 0, 15, color )
+RING("clairvoyance", CLAIRVOYANT, "marble",
+        300, 1, 0, 6, MINERAL, HI_MINERAL),
 RING("adornment", ADORNED, "wooden",        100, 1, 1, 2, WOOD, HI_WOOD),
 RING("gain strength", 0, "granite",         150, 1, 1, 7, MINERAL, HI_MINERAL),
 RING("gain constitution", 0, "opal",        150, 1, 1, 7, MINERAL,  HI_MINERAL),