3 files changed, 10 insertions, 10 deletions
diff --git a/include/winapi/handle.hpp b/include/winapi/handle.hpp
index cd114d5..1145fd6 100644
--- a/include/winapi/handle.hpp
+++ b/include/winapi/handle.hpp
@@ -33,8 +33,8 @@ public:
 
     explicit operator HANDLE() const { return ptr(); }
 
-    bool is_invalid() const;
-    static bool is_invalid(HANDLE);
+    bool is_valid() const;
+    static bool is_valid(HANDLE);
 
     void close();
 
diff --git a/src/handle.cpp b/src/handle.cpp
index ba1e4b5..66f878f 100644
--- a/src/handle.cpp
+++ b/src/handle.cpp
@@ -52,12 +52,12 @@ void Handle::swap(Handle& other) BOOST_NOEXCEPT_OR_NOTHROW {
     swap(m_impl, other.m_impl);
 }
 
-bool Handle::is_invalid() const {
-    return !m_impl || is_invalid(m_impl.get());
+bool Handle::is_valid() const {
+    return m_impl && is_valid(m_impl.get());
 }
 
-bool Handle::is_invalid(HANDLE handle) {
-    return handle == NULL || handle == INVALID_HANDLE_VALUE;
+bool Handle::is_valid(HANDLE handle) {
+    return handle != NULL && handle != INVALID_HANDLE_VALUE;
 }
 
 void Handle::close() {
@@ -149,7 +149,7 @@ void Handle::inherit(bool yes) const {
 }
 
 void Handle::Close::operator()(HANDLE impl) const {
-    if (is_invalid(impl) || is_std_handle(impl))
+    if (!is_valid(impl) || is_std_handle(impl))
         return;
     const auto ret = ::CloseHandle(impl);
     assert(ret);
diff --git a/test/unit_tests/process_worker.cpp b/test/unit_tests/process_worker.cpp
index 492ffff..1ddf1d5 100644
--- a/test/unit_tests/process_worker.cpp
+++ b/test/unit_tests/process_worker.cpp
@@ -85,9 +85,9 @@ void check_std_handles_different(Worker& worker) {
 
 void check_write(Worker& worker) {
     const auto handles = worker.test_write();
-    BOOST_TEST(!Handle::is_invalid(handles.in));
-    BOOST_TEST(!Handle::is_invalid(handles.out));
-    BOOST_TEST(!Handle::is_invalid(handles.err));
+    BOOST_TEST(Handle::is_valid(handles.in));
+    BOOST_TEST(Handle::is_valid(handles.out));
+    BOOST_TEST(Handle::is_valid(handles.err));
 }
 
 void check_redirected_output(const Buffer& buffer, const std::vector<std::string>& expected_lines) {