diff --git a/src/pow.cpp b/src/pow.cpp
index e4a4e4e41..8400c9926 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -102,11 +102,13 @@ arith_uint256 RT_CST_RST(int32_t height,uint32_t nTime,arith_uint256 bnTarget,ui
     int64_t altK; int32_t i,j,ii=0; // K is a scaling factor for integer divisions
     if ( height < 64 )
         return(bnTarget);
-    if ( ((ts[0]-ts[W]) * W * 100)/(W-1) < (T * numerator * 100)/denominator )
+    //if ( ((ts[0]-ts[W]) * W * 100)/(W-1) < (T * numerator * 100)/denominator )
+    if ( (ts[0] - ts[W]) < (T * numerator)/denominator )
     {
         //bnTarget = ((ct[0]-ct[1])/K) * max(K,(K*(nTime-ts[0])*(ts[0]-ts[W])*denominator/numerator)/T/T);
         bnTarget = ct[0] / arith_uint256(K);
-        altK = (K * (nTime-ts[0]) * (ts[0]-ts[W]) * denominator * W) / (numerator * (W-1) * (T * T));
+        //altK = (K * (nTime-ts[0]) * (ts[0]-ts[W]) * denominator * W) / (numerator * (W-1) * (T * T));
+        altK = (K * (nTime-ts[0]) * (ts[0]-ts[W]) * denominator) / (numerator * (T * T));
         fprintf(stderr,"ht.%d initial altK.%lld %d * %d * %d / %d\n",height,(long long)altK,(nTime-ts[0]),(ts[0]-ts[W]),denominator,numerator);
         if ( altK > K )
             altK = K;