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-rw-r--r--win32/Makefile.sub2
1 files changed, 2 insertions, 0 deletions
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index e64b70ec7a..03cf78110d 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -570,6 +570,8 @@ $(CONFIG_H): $(MKFILES) $(srcdir)/win32/Makefile.sub $(win_srcdir)/Makefile.sub
!if $(MSC_VER) >= 1500
#define RUBY_FUNCTION_NAME_STRING __FUNCTION__
!endif
+#define PACKED_STRUCT
+#define PACKED_STRUCT_UNALIGNED
#define RUBY_EXTERN extern __declspec(dllimport)
#define HAVE_DECL_SYS_NERR 1
#define HAVE_LIMITS_H 1