diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index c1df7c86..f93afad5 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -170,13 +170,13 @@ namespace {
   // Bonus for unstoppable passed pawns
   const Value UnstoppablePawnValue = Value(0x500);
 
-  // Rooks and queens on the 7th rank
+  // Rooks and queens on the 7th rank (modified by Joona Kiiski)
   const Value MidgameRookOn7thBonus  = Value(47);
   const Value EndgameRookOn7thBonus  = Value(98);
   const Value MidgameQueenOn7thBonus = Value(27);
   const Value EndgameQueenOn7thBonus = Value(54);
 
-  // Rooks on open files
+  // Rooks on open files (modified by Joona Kiiski)
   const Value RookOpenFileBonus = Value(43);
   const Value RookHalfOpenFileBonus = Value(19);
 
diff --git a/src/material.cpp b/src/material.cpp
index c1c3c3c2..8a13d115 100644
--- a/src/material.cpp
+++ b/src/material.cpp
@@ -37,6 +37,7 @@ using std::string;
 
 namespace {
 
+  // Values modified by Joona Kiiski
   const Value BishopPairMidgameBonus = Value(109);
   const Value BishopPairEndgameBonus = Value(97);
 
diff --git a/src/value.h b/src/value.h
index b5f56c06..3e41be48 100644
--- a/src/value.h
+++ b/src/value.h
@@ -93,7 +93,7 @@ const Value PieceValueEndgame[17] = {
   Value(0), Value(0), Value(0)
 };
 
-/// Bonus for having the side to move
+/// Bonus for having the side to move (modified by Joona Kiiski)
 
 const Value TempoValueMidgame = Value(48);
 const Value TempoValueEndgame = Value(21);