diff --git a/lib/zstd_compress.c b/lib/zstd_compress.c
index 5ca4437f..8c30b8a6 100644
--- a/lib/zstd_compress.c
+++ b/lib/zstd_compress.c
@@ -620,7 +620,7 @@ static unsigned ZSTD_NbCommonBytes (register size_t val)
     }
     else   /* Big Endian CPU */
     {
-        if (MEM_32bits())
+        if (MEM_64bits())
         {
 #       if defined(_MSC_VER) && defined(_WIN64)
             unsigned long r = 0;