diff --git a/language.version b/language.version
index a054fce78..a183a4239 100644
--- a/language.version
+++ b/language.version
@@ -1,3 +1,3 @@
 [default]
-SWWM_MODVER="\chSWWM \czGZ\c- \cw0.9.11b-pre r519 \cu(Tue  1 Jun 16:51:13 CEST 2021)\c-";
-SWWM_SHORTVER="\cw0.9.11b-pre r519 \cu(2021-06-01 16:51:13)\c-";
+SWWM_MODVER="\chSWWM \czGZ\c- \cw0.9.11b-pre r520 \cu(Tue  1 Jun 16:52:02 CEST 2021)\c-";
+SWWM_SHORTVER="\cw0.9.11b-pre r520 \cu(2021-06-01 16:52:02)\c-";
diff --git a/zscript/swwm_common_fx.zsc b/zscript/swwm_common_fx.zsc
index 00473a801..e3e480a3a 100644
--- a/zscript/swwm_common_fx.zsc
+++ b/zscript/swwm_common_fx.zsc
@@ -1237,6 +1237,8 @@ Class SWWMShadow : Actor
 		if ( other is 'SWWMShadow' ) return;
 		// no shadows for overlay actors
 		if ( other is 'GhostArtifactX' ) return;
+		// no shadows for things with zero radius
+		if ( other.radius <= 0. ) return;
 		let s = SWWMShadow(Spawn("SWWMShadow",other.pos));
 		s.target = other;
 		s.Update(true);