diff --git a/AUTHORS b/AUTHORS
index 884bffabe7e..d01d23cd7e9 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -213,6 +213,7 @@ tttak
 Unai Corzo (unaiic)
 Uri Blass (uriblass)
 Vince Negri (cuddlestmonkey)
+windfishballad
 xefoci7612
 zz4032
 
diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index cc789e35d89..7239fd1eca0 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -1072,7 +1072,7 @@ Value Eval::evaluate(const Position& pos) {
 
       // Blend nnue complexity with (semi)classical complexity
       nnueComplexity = (  397 * nnueComplexity
-                        + (477 + optimism) * abs(psq - nnue)
+                        + 477 * abs(psq - nnue)
                         ) / 1024;
 
       optimism += optimism * nnueComplexity / 256;