diff --git a/.gitignore b/.gitignore
index 3c766268f..68829cef2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,4 +53,5 @@ Makefile.gcc-orig
 # VS 2017 caches data into the hidden directory .vs
 .vs
 # Win32-specific ignores end
+.DS_Store
 
diff --git a/doc/fixes36.2 b/doc/fixes36.2
index ff9594aa0..f4cfd00a1 100644
--- a/doc/fixes36.2
+++ b/doc/fixes36.2
@@ -200,6 +200,8 @@ nurse corpse/tin chance to convey poison resistance when eaten was not honored
 make tame vampires be more aggressive when shifted to bat/fog/wolf form
 a stale gold symbol could be displayed on the status line following a switch
 	to a new symset, as observed and reported for Windows RogueEpyx symset
+successfully paying for shop damage with shop credit would be followed by
+	impossible "zero payment in money2mon"
 
 
 Fixes to Post-3.6.1 Problems that Were Exposed Via git Repository
diff --git a/src/shk.c b/src/shk.c
index 6eb4ab71a..472b1f165 100644
--- a/src/shk.c
+++ b/src/shk.c
@@ -1827,9 +1827,10 @@ int croaked;
             eshkp->robbed -= umoney;
             if (eshkp->robbed < 0L)
                 eshkp->robbed = 0L;
-            if (umoney > 0)
+            if (umoney > 0L) {
                 money2mon(shkp, umoney);
-            context.botl = 1;
+                context.botl = 1;
+            }
             pline("%s %s all your possessions.", Shknam(shkp), takes);
             taken = TRUE;
             /* where to put player's invent (after disclosure) */
@@ -2795,6 +2796,7 @@ boolean peaceful, silent;
 
     if (peaceful) {
         boolean credit_use = !!ESHK(shkp)->credit;
+
         value = check_credit(value, shkp);
         /* 'peaceful' affects general treatment, but doesn't affect
          * the fact that other code expects that all charges after the
@@ -4027,8 +4029,10 @@ boolean cant_mollify;
             currency(cost_of_damage), !animal ? "\"" : "");
     if (yn(qbuf) != 'n') {
         cost_of_damage = check_credit(cost_of_damage, shkp);
-        money2mon(shkp, cost_of_damage);
-        context.botl = 1;
+        if (cost_of_damage > 0L) {
+            money2mon(shkp, cost_of_damage);
+            context.botl = 1;
+        }
         pline("Mollified, %s accepts your restitution.", shkname(shkp));
         /* move shk back to his home loc */
         home_shk(shkp, FALSE);