diff --git a/libs/main/io_devices/pifile.cpp b/libs/main/io_devices/pifile.cpp
index e4fd8fd0..29f3af79 100644
--- a/libs/main/io_devices/pifile.cpp
+++ b/libs/main/io_devices/pifile.cpp
@@ -148,7 +148,14 @@ PIFile::PIFile(const PIString & path, PIIODevice::DeviceMode mode): PIIODevice(p
 
 
 bool PIFile::openTemporary(PIIODevice::DeviceMode mode) {
-	return open(PIString(tmpnam(0)), mode);
+	PIString tp;
+	char * rc = tmpnam(0);
+	if (!rc) return false;
+	tp = rc;
+#ifdef WINDOWS
+	tp = PIDir::temporary().path() + PIDir::separator + "file" + tp.cutLeft(1).cutRight(1);
+#endif
+	return open(tp, mode);
 }