--- a/src/petsc4py.PETSc.origin.c	2022-01-06 03:57:32.000000000 +0100
+++ b/src/petsc4py.PETSc.c	2022-01-12 20:44:44.434469854 +0100
@@ -193,7 +193,7 @@
 #define CYTHON_FAST_PYCCALL  (CYTHON_FAST_PYCALL && PY_VERSION_HEX >= 0x030600B1)
 #endif
 #if CYTHON_USE_PYLONG_INTERNALS
-  #include "longintrepr.h"
+  #include "cpython/longintrepr.h"
   #undef SHIFT
   #undef BASE
   #undef MASK