diff --git a/include/polarssl/error.h b/include/polarssl/error.h
index 4bad908..96815a7 100644
--- a/include/polarssl/error.h
+++ b/include/polarssl/error.h
@@ -67,6 +67,7 @@
  * SHA1      1  0x0076-0x0076
  * SHA2      1  0x0078-0x0078
  * SHA4      1  0x007A-0x007A
+ * PBKDF2    1  0x007C-0x007C
  *
  * High-level module nr (3 bits - 0x1...-0x8...)
  * Name     ID  Nr of Errors