diff --git a/src/powder.c b/src/powder.c
index ffe5d9545..4d4787c45 100644
--- a/src/powder.c
+++ b/src/powder.c
@@ -1846,7 +1846,7 @@ void update_particles_i(pixel *vid, int start, int inc)
 
 			if (!legacy_enable)
 			{
-				if (y-2 >= 0 && y-2 < YRES && (ptypes[t].properties&TYPE_LIQUID) && gel_scale>(rand()%250)) {//some heat convection for liquids
+				if (y-2 >= 0 && y-2 < YRES && (ptypes[t].properties&TYPE_LIQUID) && (t!=PT_GEL || gel_scale>(1+rand()%255))) {//some heat convection for liquids
 					r = pmap[y-2][x];
 					if (!(!r || parts[i].type != (r&0xFF))) {
 						if (parts[i].temp>parts[r>>8].temp) {