diff --git a/AUTHORS b/AUTHORS
index 59d692bb4..a7afa9f50 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -198,6 +198,7 @@ Nour Berakdar (Nonlinear)
 Ofek Shochat (OfekShochat, ghostway)
 Ondrej Mosnáček (WOnder93)
 Ondřej Mišina (AndrovT)
+Onur Zungur (zungur)
 Oskar Werkelin Ahlin
 Ömer Faruk Tutkun (OmerFarukTutkun)
 Pablo Vazquez
diff --git a/src/position.cpp b/src/position.cpp
index e87091783..c9ff87a53 100644
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -270,7 +270,7 @@ Position::set(const string& fenStr, bool isChess960, StateInfo* si) {
     if (rank != RANK_1 || file != FILE_NB)
         return PositionSetError("Invalid FEN. Board state encoding ended but cursor not at end.");
 
-    if (pieces(PAWN) & (RANK_1 | RANK_8))
+    if (pieces(PAWN) & (Rank1BB | Rank8BB))
         return PositionSetError("Unsupported position. Pawns on the first or eighth rank.");
 
     if (count<KING>(WHITE) != 1 || count<KING>(BLACK) != 1)