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-rw-r--r--win32/Makefile.sub1
1 files changed, 1 insertions, 0 deletions
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index e07ed93b60..afcb29cd44 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -587,6 +587,7 @@ $(CONFIG_H): $(MKFILES) $(srcdir)/win32/Makefile.sub $(win_srcdir)/Makefile.sub
#define NOINLINE(x) __declspec(noinline) x
!endif
#define UNREACHABLE __assume(0)
+#define ASSUME(x) __assume(!!(x))
#define FUNC_STDCALL(x) __stdcall x
#define FUNC_CDECL(x) __cdecl x
#define FUNC_FASTCALL(x) __fastcall x