diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9469c929..cf4ea85d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -501,6 +501,8 @@ if (NOT CROSSTOOLS)
 			target_include_directories(pip_lua PUBLIC "${_lua_src_dir}")
 			if (WIN32)
 				target_compile_definitions(pip_lua PRIVATE LUA_BUILD_AS_DLL LUA_CORE)
+			else()
+				target_compile_definitions(pip_lua PRIVATE LUA_USE_POSIX)
 			endif()
 			list(APPEND HDR_DIRS "${PIP_3PL_DIR}/LuaBridge")
 			list(APPEND HDRS ${_lua_src_hdr})
diff --git a/libs/main/io_devices/pifile.cpp b/libs/main/io_devices/pifile.cpp
index 879f0ef1..f9ed991d 100644
--- a/libs/main/io_devices/pifile.cpp
+++ b/libs/main/io_devices/pifile.cpp
@@ -176,14 +176,16 @@ bool PIFile::openTemporary(PIIODevice::DeviceMode mode) {
 	PIString tp;
 #ifdef WINDOWS
 	tp = PIDir::temporary().path() + PIDir::separator + "file" + PIString::fromNumber(randomi());
-#else
-	char * rc = tmpnam(0);
-	if (!rc) return false;
-	tp = rc;
-#endif
 	while (isExists(tp)) {
 		tp += PIString::fromNumber(randomi() % 10);
 	}
+#else
+	char template_rc[] = "/tmp/pifile_tmp_XXXXXX";
+	int fd = mkstemp(template_rc);
+	if (fd == -1) return false;
+	::close(fd);
+	tp = template_rc;
+#endif
 	return open(tp, mode);
 }
 
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 3eefbfcb..c5dae9c3 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -35,3 +35,4 @@ pip_test(math)
 pip_test(core)
 pip_test(piobject)
 pip_test(client_server pip_client_server)
+pip_test(io)
diff --git a/tests/io/testpifile.cpp b/tests/io/testpifile.cpp
new file mode 100644
index 00000000..33944763
--- /dev/null
+++ b/tests/io/testpifile.cpp
@@ -0,0 +1,14 @@
+#include "pifile.h"
+
+#include "gtest/gtest.h"
+
+TEST(PIFile_Test, openTemporary) {
+	const auto ba = PIByteArray::fromHex("AABBCC");
+	PIFile f;
+	ASSERT_TRUE(f.openTemporary());
+	ASSERT_TRUE(f.path().isNotEmpty());
+	ASSERT_EQ(ba.size(), f.write(ba));
+	ASSERT_EQ(ba, f.readAll());
+	ASSERT_TRUE(f.close());
+}
+