diff --git a/language.version b/language.version
index 0eb766f90..133579b66 100644
--- a/language.version
+++ b/language.version
@@ -1,3 +1,3 @@
 [default]
-SWWM_MODVER="\chSWWM \czGZ\c- \cw0.9.11b-pre r238 \cu(Fri 29 Jan 23:05:25 CET 2021)\c-";
-SWWM_SHORTVER="\cw0.9.11b-pre r238 \cu(2021-01-29 23:05:25)\c-";
+SWWM_MODVER="\chSWWM \czGZ\c- \cw0.9.11b-pre r239 \cu(Sat 30 Jan 10:19:42 CET 2021)\c-";
+SWWM_SHORTVER="\cw0.9.11b-pre r239 \cu(2021-01-30 10:19:42)\c-";
diff --git a/zscript/swwm_blod.zsc b/zscript/swwm_blod.zsc
index ba02bfe36..c2ba37a5d 100644
--- a/zscript/swwm_blod.zsc
+++ b/zscript/swwm_blod.zsc
@@ -94,7 +94,7 @@ Class mkBloodSpray : Actor
 		Vector3 setofs;
 		setofs = (cos(target.angle)*attachofs.x+sin(target.angle)*attachofs.y,sin(target.angle)*attachofs.x-cos(target.angle)*attachofs.y,attachofs.z);
 		SetOrigin(level.Vec3Offset(target.pos,setofs),false);
-		int sz = max(1,args[0]/2)-Random[Blood](0,2);
+		int sz = max(1,args[0]/2-Random[Blood](0,2));
 		double ang, pt;
 		for ( int i=0; i<sz; i++ )
 		{