1 files changed, 4 insertions, 0 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_scanf.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_scanf.inc
index 63d67a7115e..6da025cf937 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_scanf.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_scanf.inc
@@ -12,6 +12,10 @@
 //===----------------------------------------------------------------------===//
 #include <stdarg.h>
 
+#ifdef _WIN32
+#define va_copy(dst, src) ((dst) = (src))
+#endif  // _WIN32
+
 struct ScanfSpec {
   char c;
   unsigned size;