diff --git a/doc/fixes3-7-0.txt b/doc/fixes3-7-0.txt
index 7fffaf8e3..b6ab75153 100644
--- a/doc/fixes3-7-0.txt
+++ b/doc/fixes3-7-0.txt
@@ -1248,6 +1248,7 @@ the throne room on the Samurai quest home level lacked a throne but gave
 coughing due to stinking cloud wakes up nearby monsters
 stop occupation when timed levitation or choking issues a message
 use #monster to make dragon steed breathe
+wand of probing reveals tin contents
 
 
 Fixes to 3.7.0-x General Problems Exposed Via git Repository
diff --git a/src/zap.c b/src/zap.c
index dc3854ea4..68b6662ec 100644
--- a/src/zap.c
+++ b/src/zap.c
@@ -566,7 +566,8 @@ probe_objchain(struct obj *otmp)
             otmp->lknown = 1;
             if (!SchroedingersBox(otmp))
                 otmp->cknown = 1;
-        }
+        } else if (otmp->otyp == TIN)
+            otmp->known = 1;
     }
 }
 
@@ -2163,7 +2164,8 @@ bhito(struct obj *obj, struct obj *otmp)
                     (void) display_cinventory(obj);
                 }
                 res = 1;
-            }
+            } else if (obj->otyp == TIN)
+                obj->known = 1;
             if (res)
                 learn_it = TRUE;
             break;