diff --git a/src/p_map.cpp b/src/p_map.cpp
index 37ba513d7..26c08af26 100644
--- a/src/p_map.cpp
+++ b/src/p_map.cpp
@@ -5046,7 +5046,7 @@ void P_RadiusAttack(AActor *bombspot, AActor *bombsource, int bombdamage, int bo
 	double bombdamagefloat = (double)bombdamage;
 
 	FPortalGroupArray grouplist(FPortalGroupArray::PGA_Full3d);
-	FMultiBlockThingsIterator it(grouplist, bombspot->X(), bombspot->Y(), bombspot->Z() - bombdistance, bombspot->Height + bombdistance*2, bombdistancefloat, false, bombspot->Sector);
+	FMultiBlockThingsIterator it(grouplist, bombspot->X(), bombspot->Y(), bombspot->Z() - bombdistance, bombspot->Height + bombdistance*2, bombdistance, false, bombspot->Sector);
 	FMultiBlockThingsIterator::CheckResult cres;
 
 	if (flags & RADF_SOURCEISSPOT)