diff --git a/src/powder.c b/src/powder.c
index e9cf2ce41..ceab90e16 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -1932,7 +1932,7 @@ void update_particles_i(pixel *vid, int start, int inc)
 					s = 1;
 
 					//A fix for ice with ctype = 0
-					if (t==PT_ICEI && parts[i].ctype==0)
+					if (t==PT_ICEI && (parts[i].ctype==0 || parts[i].ctype>=PT_NUM || parts[i].ctype==PT_ICEI))
 						parts[i].ctype = PT_WATR;
 
 					if (ctemph>ptransitions[t].thv&&ptransitions[t].tht>-1) {