diff --git a/include/obj.h b/include/obj.h
index 0fdd0d1ad..685c9165f 100644
--- a/include/obj.h
+++ b/include/obj.h
@@ -133,14 +133,19 @@ struct obj {
 #define spestudied usecount /* # of times a spellbook has been studied */
     unsigned oeaten;        /* nutrition left in food, if partly eaten */
     long age;               /* creation date */
-    long owornmask;
+    long owornmask;        /* bit mask indicating which equipment slot(s) an
+                            * item is worn in [by hero or by monster; could
+                            * indicate more than one bit: attached iron ball
+                            * that's also wielded];
+                            * overloaded for the destination of migrating
+                            * objects (which can't be worn at same time) */
     unsigned lua_ref_cnt;  /* # of lua script references for this object */
     xchar omigr_from_dnum; /* where obj is migrating from */
     xchar omigr_from_dlevel; /* where obj is migrating from */
     struct oextra *oextra; /* pointer to oextra struct */
 };
 
-#define newobj() (struct obj *) alloc(sizeof(struct obj))
+#define newobj() (struct obj *) alloc(sizeof (struct obj))
 
 /***
  **     oextra referencing and testing macros
diff --git a/src/mkobj.c b/src/mkobj.c
index 8345a055c..abe9f15be 100644
--- a/src/mkobj.c
+++ b/src/mkobj.c
@@ -1380,7 +1380,7 @@ shrink_glob(
         if (delta >= (long) obj->owt) {
             /* gone; no newsym() or message here--forthcoming map update for
                level arrival is all that's needed */
-            obj->owt = 0; /* not required; accurately reflect's obj's state */
+            obj->owt = 0; /* not required; accurately reflects obj's state */
             shrinking_glob_gone(obj);
         } else {
             /* shrank but not gone; reduce remaining weight */
@@ -1524,8 +1524,8 @@ shrinking_glob_gone(struct obj *obj)
         useupall(obj); /* freeinv()+obfree() */
     } else {
         if (obj->where == OBJ_MIGRATING) {
-            /* clear destination flag so that obfree()'s check for freeing
-               a worn object doesn't get a false hit */
+            /* destination flag overloads owornmask; clear it so obfree()'s
+               check for freeing a worn object doesn't get a false hit */
             obj->owornmask = 0L;
         } else if (obj->where == OBJ_MINVENT) {
             /* monsters don't wield globs so this isn't strictly needed */