diff --git a/doc/fixes37.0 b/doc/fixes37.0
index 84d3e4eeb..be1aa5da8 100644
--- a/doc/fixes37.0
+++ b/doc/fixes37.0
@@ -1,4 +1,4 @@
-$NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.239 $ $NHDT-Date: 1593768043 2020/07/03 09:20:43 $
+$NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.240 $ $NHDT-Date: 1593772051 2020/07/03 10:27:31 $
 
 General Fixes and Modified Features
 -----------------------------------
@@ -208,6 +208,9 @@ reading the Book of the Dead while blind is allowed; doing so gives
 reading cursed Book of the Dead while blind gave feedback for sighted hero
 reading non-cursed Book of the Dead without having prepped the other tools
 	referred to those as "artifacts" even though they aren't; use "relics"
+zapping a line of boulders with striking or force bolt was updating 'couldsee'
+	but deferring 'cansee', resulting in seeing the first boulder fracture
+	and only hearing that happen for the others despite coming into view
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository
diff --git a/src/zap.c b/src/zap.c
index 8cd10ba2f..35bdfd6bb 100644
--- a/src/zap.c
+++ b/src/zap.c
@@ -1,4 +1,4 @@
-/* NetHack 3.6	zap.c	$NHDT-Date: 1593306912 2020/06/28 01:15:12 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.343 $ */
+/* NetHack 3.6	zap.c	$NHDT-Date: 1593772051 2020/07/03 10:27:31 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.344 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /*-Copyright (c) Robert Patrick Rankin, 2013. */
 /* NetHack may be freely redistributed.  See license for details. */
@@ -4824,8 +4824,12 @@ register struct obj *obj; /* no texts here! */
     if (obj->where == OBJ_FLOOR) {
         obj_extract_self(obj); /* move rocks back on top */
         place_object(obj, obj->ox, obj->oy);
-        if (!does_block(obj->ox, obj->oy, &levl[obj->ox][obj->oy]))
+        if (!does_block(obj->ox, obj->oy, &levl[obj->ox][obj->oy])) {
             unblock_point(obj->ox, obj->oy);
+            /* need immediate update in case this is a striking/force bolt
+               zap that is about hit more things */
+            vision_recalc(0);
+        }
         if (cansee(obj->ox, obj->oy))
             newsym(obj->ox, obj->oy);
     }