diff --git a/src/sinks/ansicolor_sink.cpp b/src/sinks/ansicolor_sink.cpp
index 7237571a..5de60b48 100644
--- a/src/sinks/ansicolor_sink.cpp
+++ b/src/sinks/ansicolor_sink.cpp
@@ -113,9 +113,9 @@ ansicolor_stderr_sink<Mutex>::ansicolor_stderr_sink(color_mode mode)
 
 // template instantiations
 template class SPDLOG_API ansicolor_stdout_sink<std::mutex>;
-template class SPDLOG_API ansicolor_stdout_sink<spdlog::details::null_mutex>;
+template class SPDLOG_API ansicolor_stdout_sink<details::null_mutex>;
 template class SPDLOG_API ansicolor_stderr_sink<std::mutex>;
-template class SPDLOG_API ansicolor_stderr_sink<spdlog::details::null_mutex>;
+template class SPDLOG_API ansicolor_stderr_sink<details::null_mutex>;
 
 }  // namespace sinks
 }  // namespace spdlog
diff --git a/src/sinks/wincolor_sink.cpp b/src/sinks/wincolor_sink.cpp
index 02f43f73..a03957ac 100644
--- a/src/sinks/wincolor_sink.cpp
+++ b/src/sinks/wincolor_sink.cpp
@@ -122,14 +122,14 @@ void wincolor_sink<Mutex>::write_to_file_(const memory_buf_t &formatted) {
 }
 
 // template instantiations
-template class SPDLOG_API wincolor_sink<std::mutex>;
-template class SPDLOG_API wincolor_sink<details::null_mutex>;
+template <typename Mutex>
+wincolor_stdout_sink<Mutex>::wincolor_stdout_sink(color_mode mode)
+    : wincolor_sink<Mutex>(::GetStdHandle(STD_OUTPUT_HANDLE), mode) {}
 
-template class SPDLOG_API wincolor_stdout_sink<std::mutex>;
-template class SPDLOG_API wincolor_stdout_sink<spdlog::details::null_mutex>;
-
-template class SPDLOG_API wincolor_stderr_sink<std::mutex>;
-template class SPDLOG_API wincolor_stderr_sink<spdlog::details::null_mutex>;
+// wincolor_stderr_sink
+template <typename Mutex>
+wincolor_stderr_sink<Mutex>::wincolor_stderr_sink(color_mode mode)
+    : wincolor_sink<Mutex>(::GetStdHandle(STD_ERROR_HANDLE), mode) {}
 
 }  // namespace sinks
 }  // namespace spdlog