diff --git a/include/v8config.h b/include/v8config.h
index 33bb3f943..e6053a152 100644
--- a/include/v8config.h
+++ b/include/v8config.h
@@ -478,7 +478,7 @@ path. Add it with -I<path> to the command line
 
 #if V8_HAS_BUILTIN_ASSUME_ALIGNED
 # define V8_ASSUME_ALIGNED(ptr, alignment) \
-  __builtin_assume_aligned((ptr), (alignment))
+  (ptr)
 #else
 # define V8_ASSUME_ALIGNED(ptr, alignment) (ptr)
 #endif
diff --git a/src/base/macros.h b/src/base/macros.h
index 25a533c5a..8256050eb 100644
--- a/src/base/macros.h
+++ b/src/base/macros.h
@@ -388,9 +388,9 @@ bool is_inbounds(float_t v) {
 
 // Setup for Windows shared library export.
 #ifdef BUILDING_V8_SHARED
-#define V8_EXPORT_PRIVATE __declspec(dllexport)
+#define V8_EXPORT_PRIVATE //__declspec(dllexport)
 #elif USING_V8_SHARED
-#define V8_EXPORT_PRIVATE __declspec(dllimport)
+#define V8_EXPORT_PRIVATE //__declspec(dllimport)
 #else
 #define V8_EXPORT_PRIVATE
 #endif  // BUILDING_V8_SHARED