diff --git a/src/main/java/de/ailis/usb4java/libusb/Device.java b/src/main/java/de/ailis/usb4java/libusb/Device.java
index f50a125..a4518dd 100644
--- a/src/main/java/de/ailis/usb4java/libusb/Device.java
+++ b/src/main/java/de/ailis/usb4java/libusb/Device.java
@@ -40,10 +40,10 @@ public final class Device
     private long pointer;
 
     /**
-     * Private constructor to prevent manual instantiation. Devices are
+     * Package-private constructor to prevent manual instantiation. Devices are
      * always created by JNI.
      */
-    private Device()
+    Device()
     {
         // Empty
     }
diff --git a/src/main/java/de/ailis/usb4java/libusb/EndpointDescriptor.java b/src/main/java/de/ailis/usb4java/libusb/EndpointDescriptor.java
index 5cac8ea..ef5a800 100644
--- a/src/main/java/de/ailis/usb4java/libusb/EndpointDescriptor.java
+++ b/src/main/java/de/ailis/usb4java/libusb/EndpointDescriptor.java
@@ -34,10 +34,10 @@ public final class EndpointDescriptor implements UsbEndpointDescriptor
     private long pointer;
 
     /**
-     * Private constructor to prevent manual instantiation. Endpoint 
-     * descriptors area always created by JNI.
+     * Package-private constructor to prevent manual instantiation. Endpoint 
+     * descriptors are always created by JNI.
      */
-    private EndpointDescriptor()
+    EndpointDescriptor()
     {
         // Empty
     }
diff --git a/src/main/java/de/ailis/usb4java/libusb/Interface.java b/src/main/java/de/ailis/usb4java/libusb/Interface.java
index 1975628..75d0208 100644
--- a/src/main/java/de/ailis/usb4java/libusb/Interface.java
+++ b/src/main/java/de/ailis/usb4java/libusb/Interface.java
@@ -24,10 +24,10 @@ public final class Interface
     private long pointer;
 
     /**
-     * Private constructor to prevent manual instantiation. Interfaces 
-     * area always created by JNI.
+     * Package-private constructor to prevent manual instantiation. Interfaces 
+     * are always created by JNI.
      */
-    private Interface()
+    Interface()
     {
         // Empty
     }
diff --git a/src/main/java/de/ailis/usb4java/libusb/InterfaceDescriptor.java b/src/main/java/de/ailis/usb4java/libusb/InterfaceDescriptor.java
index 2c6361e..3d9df10 100644
--- a/src/main/java/de/ailis/usb4java/libusb/InterfaceDescriptor.java
+++ b/src/main/java/de/ailis/usb4java/libusb/InterfaceDescriptor.java
@@ -34,10 +34,10 @@ public final class InterfaceDescriptor implements UsbInterfaceDescriptor
     private long pointer;
 
     /**
-     * Private constructor to prevent manual instantiation. Interface 
-     * descriptors area always created by JNI.
+     * Package-private constructor to prevent manual instantiation. Interface 
+     * descriptors are always created by JNI.
      */
-    private InterfaceDescriptor()
+    InterfaceDescriptor()
     {
         // Empty
     }
diff --git a/src/main/java/de/ailis/usb4java/libusb/Version.java b/src/main/java/de/ailis/usb4java/libusb/Version.java
index 22f9a28..209c545 100644
--- a/src/main/java/de/ailis/usb4java/libusb/Version.java
+++ b/src/main/java/de/ailis/usb4java/libusb/Version.java
@@ -26,10 +26,10 @@ public final class Version implements Comparable<Version>
     private long pointer;
     
     /**
-     * Private constructor to prevent manual instantiation. An instance
+     * Package-private constructor to prevent manual instantiation. An instance
      * is only returned by the JNI method {@link LibUSB#getVersion()}.
      */
-    private Version()
+    Version()
     {
         // Empty
     }