diff --git a/cuda_bindings/build_hooks.py b/cuda_bindings/build_hooks.py
index 99ad5c66268..63a371d125d 100644
--- a/cuda_bindings/build_hooks.py
+++ b/cuda_bindings/build_hooks.py
@@ -137,6 +137,7 @@ def _build_cuda_bindings(debug=False):
     that metadata queries do not require a CUDA toolkit installation.
     """
     from Cython.Build import cythonize
+    from Cython.Compiler import Options as _CythonOptions
 
     global _extensions
 
@@ -230,6 +231,7 @@ def get_static_libraries(f):
         )
 
     # Cythonize
+    _CythonOptions.warning_errors = True
     cython_directives = {"language_level": 3, "embedsignature": True, "binding": True, "freethreading_compatible": True}
     if compile_for_coverage:
         cython_directives["linetrace"] = True
diff --git a/cuda_bindings/cuda/bindings/_lib/windll.pxd b/cuda_bindings/cuda/bindings/_lib/windll.pxd
index 294a1a9fd90..b5fd5c4db90 100644
--- a/cuda_bindings/cuda/bindings/_lib/windll.pxd
+++ b/cuda_bindings/cuda/bindings/_lib/windll.pxd
@@ -14,7 +14,7 @@ cdef extern from "windows.h" nogil:
     ctypedef const char *LPCSTR
     ctypedef int BOOL
 
-    cdef DWORD LOAD_LIBRARY_SEARCH_SYSTEM32 = 0x00000800
+    const DWORD LOAD_LIBRARY_SEARCH_SYSTEM32
 
     HMODULE _LoadLibraryExW "LoadLibraryExW"(
         LPCWSTR lpLibFileName,