diff --git a/src/main/java/org/usb4java/LibUsb.java b/src/main/java/org/usb4java/LibUsb.java
index 8757f85..2df3077 100644
--- a/src/main/java/org/usb4java/LibUsb.java
+++ b/src/main/java/org/usb4java/LibUsb.java
@@ -1940,11 +1940,12 @@ public final class LibUsb
      *            timeout, use value 0.
      * @return on success the number of bytes actually transferred,
      *         {@link #ERROR_TIMEOUT} if the transfer timed out,
-     *         {@link #ERROR_PIPE} if the control request was not supported by
-     *         the device, {@link #ERROR_NO_DEVICE} if the device has been
-     *         disconnected, {@link LIBUSB_ERROR_INVALID_PARAM} if the transfer
-     *         size is larger than the operating system and/or hardware can 
-     *         support. Another ERROR code on other failures
+     *         {@link #ERROR_PIPE} if the control request was not supported by the device,
+     *         {@link #ERROR_NO_DEVICE} if the device has been disconnected,
+     *         {@link #ERROR_BUSY} if called from event handling context,
+     *         {@link #ERROR_INVALID_PARAM} if the transfer size is larger than the operating system and/or
+     *         hardware can support.
+     *         Another ERROR code on other failures
      */
     public static native int controlTransfer(final DeviceHandle handle,
         final byte bmRequestType, final byte bRequest, final short wValue,