diff --git a/conf/nonclangable.conf b/conf/nonclangable.conf
index 70e72b5f..70b5be99 100644
--- a/conf/nonclangable.conf
+++ b/conf/nonclangable.conf
@@ -333,8 +333,8 @@ CXXFLAGS:pn-libeigen:append:toolchain-clang:powerpc = " -DEIGEN_ALTIVEC_DISABLE_
 # (aka 'void (*)(VkCommandBuffer_T *)') converts to incompatible function type [-Werror,-Wcast-function-type-strict]
 CXXFLAGS:pn-opengl-es-cts:append:toolchain-clang = " -Wno-error=unsafe-buffer-usage -Wno-error=cast-function-type-strict"
 CXXFLAGS:pn-vulkan-cts:append:toolchain-clang = " -Wno-error=unsafe-buffer-usage -Wno-error=cast-function-type-strict"
-# see https://github.com/jtv/libpqxx/issues/738
-CXXFLAGS:pn-vulkan-samples:append:toolchain-clang = " -Wno-error=deprecated-declarations"
+# Wno-error=overriding-option needed with clang-20
+CXXFLAGS:pn-vulkan-samples:append:toolchain-clang = " -Wno-error=overriding-option"
 # Workaround for https://gitlab.gnome.org/GNOME/gtk/-/issues/6033
 CFLAGS:pn-gtk4:append:toolchain-clang = " -Wno-error=int-conversion"