diff --git a/language.version b/language.version
index cd706da70..9f896e586 100644
--- a/language.version
+++ b/language.version
@@ -1,2 +1,2 @@
 [default]
-SWWM_MODVER="\chSWWM \cwGZ\c- r522 (Thu  3 Sep 16:12:10 CEST 2020)";
+SWWM_MODVER="\chSWWM \cwGZ\c- r523 (Thu  3 Sep 16:20:14 CEST 2020)";
diff --git a/zscript/swwm_player.zsc b/zscript/swwm_player.zsc
index 110bc90af..d78757df6 100644
--- a/zscript/swwm_player.zsc
+++ b/zscript/swwm_player.zsc
@@ -657,7 +657,7 @@ Class Demolitionist : PlayerPawn
 				A_StartSound("demolitionist/bump",CHAN_DAMAGE,CHANF_OVERLAP);
 				a.A_StartSound("demolitionist/bump",CHAN_DAMAGE,CHANF_OVERLAP);
 				bumptic = gametic+int(20+spd/4.);
-				if ( (diff.z < a.height) && (lastvelz >= -25) && (a.bDONTTHRUST || (a.Mass >= Mass*1.5)) )
+				if ( (diff.z < a.height) && (lastvelz >= -25) && (a.bDONTTHRUST || (a.Mass >= Mass*1.5)) && a.bSOLID )
 				{
 					if ( bumped ) continue;
 					bumped = true;