diff --git a/README.md b/README.md
index d3169dd..7c3e059 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,13 @@ _A platform-independent serial port access library for Java._
 
 For usage examples, please refer to the [Usage wiki](https://github.com/Fazecast/jSerialComm/wiki/Usage-Examples).
 
+If you intend to use the library in multiple applications simultaneously, please make sure
+to set ```fazecast.jSerialComm.appid``` property before accessing the SerialPort class so that 
+applications don't accidentally delete each others temporary files during boot-up:
+```
+System.setProperty("fazecast.jSerialComm.appid", "YOUR_APPLICATION_IDENTIFIER")
+```
+
 In order to use the ```jSerialComm``` library in your own project, you must simply
 include the JAR file in your build path and import it like any other
 Java package using ```import com.fazecast.jSerialComm.*;```.
diff --git a/src/main/java/com/fazecast/jSerialComm/SerialPort.java b/src/main/java/com/fazecast/jSerialComm/SerialPort.java
index aca3f2e..d206bbd 100644
--- a/src/main/java/com/fazecast/jSerialComm/SerialPort.java
+++ b/src/main/java/com/fazecast/jSerialComm/SerialPort.java
@@ -51,6 +51,9 @@ public final class SerialPort
 {
 	// Static initializer loads correct native library for this machine
 	private static final String versionString = "2.7.0";
+	// Used to distinguish multiple processes running this lib
+	private static final String TMPDIR_APPID_PROPERTY = "fazecast.jSerialComm.appid";
+
 	private static volatile boolean isAndroid = false;
 	private static volatile boolean isUnixBased = false;
 	private static volatile boolean isWindows = false;
@@ -62,7 +65,13 @@ public final class SerialPort
 		String tempFileDirectory = System.getProperty("java.io.tmpdir");
 		if ((tempFileDirectory.charAt(tempFileDirectory.length()-1) != '\\') && (tempFileDirectory.charAt(tempFileDirectory.length()-1) != '/'))
 			tempFileDirectory += "/";
+
+		// Make sure to use appId to separate tmpdir directories if library is used by multiple modules, so they don't erase each others folders accidentally.
+		String appId = System.getProperty(TMPDIR_APPID_PROPERTY, "");
 		tempFileDirectory += "jSerialComm/";
+		if (!appId.isEmpty()) {
+			tempFileDirectory += appId + (!appId.endsWith("/") ? "/" : "");
+		}
 		deleteDirectory(new File(tempFileDirectory));
 
 		// Determine Operating System and architecture