Designated initializers are a C99 (or newer) feature, and Visual Studio doesn't (part) support C99 (or newer). D:\code\incubator-nuttx\sched\wqueue\kwork_thread.c(94,50): error C2059: syntax error : ',' Reference: https://docs.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance?view=msvc-160#c-standard-library-features-1 https://docs.microsoft.com/en-us/cpp/error-messages/compiler-errors-1/compiler-error-c2059?view=msvc-170 Signed-off-by: chao an <anchao@xiaomi.com>