diff --git a/src/elements/dstw.c b/src/elements/dstw.c
index 5d188dfc6..a0aa23be3 100644
--- a/src/elements/dstw.c
+++ b/src/elements/dstw.c
@@ -27,13 +27,15 @@ int update_DSTW(UPDATE_FUNC_ARGS) {
 				if ((r&0xFF)==PT_SALT && 1>(rand()%250))
 				{
 					part_change_type(i,x,y,PT_SLTW);
-					part_change_type(r>>8,x+rx,y+ry,PT_SLTW);
+					// on average, convert 3 DSTW to SLTW before SALT turns into SLTW
+					if (rand()%3==0)
+						part_change_type(r>>8,x+rx,y+ry,PT_SLTW);
 				}
 				if (((r&0xFF)==PT_WATR||(r&0xFF)==PT_SLTW) && 1>(rand()%500))
 				{
 					part_change_type(i,x,y,PT_WATR);
 				}
-				if ((r&0xFF)==PT_SLTW && 1>(rand()%500))
+				if ((r&0xFF)==PT_SLTW && 1>(rand()%10000))
 				{
 					part_change_type(i,x,y,PT_SLTW);
 				}