diff --git a/src/elements/pyro.c b/src/elements/pyro.c
index 316092092..aeac407e6 100644
--- a/src/elements/pyro.c
+++ b/src/elements/pyro.c
@@ -41,6 +41,7 @@ int update_PYRO(UPDATE_FUNC_ARGS) {
 					part_change_type(r>>8,x+rx,y+ry,PT_FIRE);
 					parts[r>>8].temp = restrict_flt(ptypes[PT_FIRE].heat + (ptypes[rt].flammable/2), MIN_TEMP, MAX_TEMP);
 					parts[r>>8].life = rand()%80+180;
+					parts[r>>8].tmp = parts[r>>8].ctype = 0;
 					if (ptypes[rt].explosive)
 						pv[y/CELL][x/CELL] += 0.25f * CFDS;
 					continue;