diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index ecbf4a8ecb..6e66492554 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -875,6 +875,7 @@ jobs:
               options+=" -DCMAKE_RC_COMPILER=$MSDK_BINU/rc.exe"
               options+=" -DCMAKE_MT=$MSDK_BINU/mt.exe"
               options+=" -DCMAKE_C_COMPILER=$MSVC_BINU/cl.exe"
+              rcflags="${cflags}"
             fi
             [ "${_chkprefill}" = '_chkprefill' ] && options+=' -D_CURL_PREFILL=OFF'
             if [ -n "${MATRIX_INSTALL_VCPKG}" ]; then