diff --git a/src/main/java/de/ailis/usb4java/utils/DescriptorUtils.java b/src/main/java/de/ailis/usb4java/utils/DescriptorUtils.java
index 90f0f80..653564e 100644
--- a/src/main/java/de/ailis/usb4java/utils/DescriptorUtils.java
+++ b/src/main/java/de/ailis/usb4java/utils/DescriptorUtils.java
@@ -274,8 +274,8 @@ public final class DescriptorUtils
             descriptor.bLength(),
             descriptor.bDescriptorType(),
             String.format("0x%02x", descriptor.bEndpointAddress() & 0xff),
-            descriptor.bEndpointAddress() & 0xf,
-            ((descriptor.bEndpointAddress() & 0x80) == 0) ? ("OUT") : ("IN"),
+            descriptor.bEndpointAddress() & 0x0f,
+            ((descriptor.bEndpointAddress() & LibUsb.ENDPOINT_IN) == 0) ? ("OUT") : ("IN"),
             descriptor.bmAttributes() & 0xff,
             getTransferTypeName(descriptor.bmAttributes()),
             getSynchTypeName(descriptor.bmAttributes()),