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-rw-r--r--numpy/core/src/npymath/npy_math_internal.h.src3
1 files changed, 3 insertions, 0 deletions
diff --git a/numpy/core/src/npymath/npy_math_internal.h.src b/numpy/core/src/npymath/npy_math_internal.h.src
index 5b418342f..15d35637f 100644
--- a/numpy/core/src/npymath/npy_math_internal.h.src
+++ b/numpy/core/src/npymath/npy_math_internal.h.src
@@ -54,6 +54,9 @@
* ====================================================
*/
#include "npy_math_private.h"
+#ifdef _MSC_VER
+# include <intrin.h> // for __popcnt
+#endif
/* Magic binary numbers used by bit_count
* For type T, the magic numbers are computed as follows: