diff --git a/crawl-ref/source/zap-data.h b/crawl-ref/source/zap-data.h
index 83836536516..8b7c3de52c2 100644
--- a/crawl-ref/source/zap-data.h
+++ b/crawl-ref/source/zap-data.h
@@ -2438,8 +2438,8 @@ _mon_hex_zap(ZAP_VITRIFY, BEAM_VITRIFY),
     ZAP_PARAGON_IMPACT,
     "shockwave",
     200,
-    nullptr,
-    nullptr,
+    new dicedef_calculator<4, 10, 1, 10>,
+    new tohit_calculator<AUTOMATIC_HIT>,
     new dicedef_calculator<4, 10, 1, 10>,
     new tohit_calculator<AUTOMATIC_HIT>,
     WHITE,