diff --git a/src/pow.cpp b/src/pow.cpp
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -70,7 +70,7 @@
         const CBlockIndex *p2016 = pindexPrev->GetAncestor(nHeight - 2017);
         int64_t t = pindexPrev->GetBlockTime() - p2016->GetBlockTime();
 
-        // If too fast, increase the target by 1/256.  Std deviation over
+        // If too fast, decrease the target by 1/256.  Std deviation over
         // 2016 blocks is 2.2%.
         if (t < params.nPowTargetSpacing * 2016 * 95 / 100) {
             nTarget -= (nTarget >> 8);
@@ -84,11 +84,11 @@
     int64_t mtp6blocks =
         pindexPrev->GetMedianTimePast() - pindex6->GetMedianTimePast();
 
-    // If too fast (< 30 mins), increase the target by 1/256.
+    // If too fast (< 30 mins), decrease the target by 1/256.
     if (mtp6blocks < params.nPowTargetSpacing * 30 / 10) {
         nTarget -= (nTarget >> 8);
     }
-    // If too slow (> 128 mins), decrease the target by 1/64.
+    // If too slow (> 128 mins), increase the target by 1/64.
     else if (mtp6blocks > params.nPowTargetSpacing * 128 / 10) {
         nTarget += (nTarget >> 6);
     }