diff --git a/python/cucim/src/cucim/skimage/_vendored/_ndimage_filters_core.py b/python/cucim/src/cucim/skimage/_vendored/_ndimage_filters_core.py
index e1c8ade57..13cccd6b7 100644
--- a/python/cucim/src/cucim/skimage/_vendored/_ndimage_filters_core.py
+++ b/python/cucim/src/cucim/skimage/_vendored/_ndimage_filters_core.py
@@ -190,7 +190,6 @@ def _call_kernel(
 
 template<> struct std::is_floating_point<float16> : std::true_type {};
 template<> struct std::is_signed<float16> : std::true_type {};
-template<class T> struct std::is_signed<complex<T>> : std::is_signed<T> {};
 """