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diff --git a/absl/base/optimization.h b/absl/base/optimization.h
index db8beaf..aaaffa4 100644
--- a/absl/base/optimization.h
+++ b/absl/base/optimization.h
@@ -46,6 +46,7 @@
// GCC will not tail call given inline volatile assembly.
#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() __asm__ __volatile__("")
#elif defined(_MSC_VER)
+#include <intrin.h>
// The __nop() intrinsic blocks the optimisation.
#define ABSL_BLOCK_TAIL_CALL_OPTIMIZATION() __nop()
#else
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