Update cupyx/scipy/interpolate/_bspline.py
@@ -73,7 +73,7 @@ INTERVAL_MODULE = cupy.RawModule(
D_BOOR_KERNEL = r'''
#include <cupy/complex.cuh>
-#include <math_constants.h>
+#include <cupy/math_constants.h>
#define COMPUTE_LINEAR 0x1
template<typename T>
