diff --git a/include/polarssl/error.h b/include/polarssl/error.h
index af2f331..7ef8a74 100644
--- a/include/polarssl/error.h
+++ b/include/polarssl/error.h
@@ -57,6 +57,7 @@
  * PADLOCK   1  0x0030-0x0030
  * DES       1  0x0032-0x0032
  * NET      11  0x0040-0x0054
+ * CTR_DBRG  3  0x0034-0x0038
  *
  * High-level module nr (3 bits - 0x1...-0x8...)
  * Name     ID  Nr of Errors