diff --git a/src/elements/phot.c b/src/elements/phot.c
index 59e9cd8b9..a6a5d0714 100644
--- a/src/elements/phot.c
+++ b/src/elements/phot.c
@@ -6,8 +6,8 @@ int update_PHOT(UPDATE_FUNC_ARGS) {
 	if (1>rand()%10) update_PYRO(UPDATE_FUNC_SUBCALL_ARGS);
 	for (rx=-1; rx<2; rx++)
 		for (ry=-1; ry<2; ry++)
-			if (x+rx>=0 && y+ry>0 && x+rx<XRES && y+ry<YRES && (rx || ry)) {
-				r = pmap[x+rx][y+ry];
+			if (x+rx>=0 && y+ry>=0 && x+rx<XRES && y+ry<YRES && (rx || ry)) {
+				r = pmap[y+ry][x+rx];
 				if ((r>>8)>=NPART || !r)
 					continue;
 				if ((r&0xFF)==PT_ISOZ && 5>(rand()%2000))
diff --git a/src/elements/sprk.c b/src/elements/sprk.c
index 39f74975b..f107b9af6 100644
--- a/src/elements/sprk.c
+++ b/src/elements/sprk.c
@@ -25,6 +25,10 @@ int update_SPRK(UPDATE_FUNC_ARGS) {
 		kill_part(i);
 		return 1;
 	}
+	else if (ct==PT_NTCT || ct==PT_PTCT)
+	{
+		update_NPTCT(UPDATE_FUNC_SUBCALL_ARGS);
+	}
 	else if (ct==PT_ETRD&&parts[i].life==1)
 	{
 		nearp = nearest_part(i, PT_ETRD);