diff --git a/include/mimalloc-atomic.h b/include/mimalloc-atomic.h
index e1fdda16..e3e3186d 100644
--- a/include/mimalloc-atomic.h
+++ b/include/mimalloc-atomic.h
@@ -25,8 +25,8 @@ terms of the MIT license. A copy of the license can be found in the file
 #define  mi_memory_order(name)  std::memory_order_##name
 #elif defined(_MSC_VER)
 // Use MSVC C wrapper for C11 atomics
-#define _Atomic(tp)         tp
-#define ATOMIC_VAR_INIT(x)  x
+#define  _Atomic(tp)            tp
+#define  ATOMIC_VAR_INIT(x)     x
 #define  mi_atomic(name)        mi_atomic_##name
 #define  mi_memory_order(name)  mi_memory_order_##name
 #else
diff --git a/include/mimalloc.h b/include/mimalloc.h
index f44f6d9a..4b0a911f 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -8,7 +8,7 @@ terms of the MIT license. A copy of the license can be found in the file
 #ifndef MIMALLOC_H
 #define MIMALLOC_H
 
-#define MI_MALLOC_VERSION 164   // major + 2 digits minor
+#define MI_MALLOC_VERSION 166   // major + 2 digits minor
 
 // ------------------------------------------------------
 // Compiler specific attributes