diff --git a/crypto/err/err.h b/crypto/err/err.h
index e8c7f6625..2b3c80f5f 100644
--- a/crypto/err/err.h
+++ b/crypto/err/err.h
@@ -130,6 +130,7 @@ typedef struct err_state_st
 #define ERR_LIB_ENGINE		38
 #define ERR_LIB_OCSP            39
 #define ERR_LIB_UI              40
+#define ERR_LIB_COMP            41
 
 #define ERR_LIB_USER		128