Fix compile errors under MSVC

[stockfish] / src / bitcount.h

diff --git a/src/bitcount.h b/src/bitcount.h
index 4016063383938fe7fbcc9309ff9767a2bfec6a7c..a4133fb21723db8981205fdf6f0f843f580e0190 100644 (file)
--- a/src/bitcount.h
+++ b/src/bitcount.h
@@ -48,7 +48,7 @@
 
 // Select type of intrinsic bit count instruction to use
 
-#if defined(_MSC_VER) // Microsoft compiler
+#if defined(_MSC_VER) && defined(_WIN64) // Microsoft compiler
 
 #include <intrin.h>