diff --git a/contrib/pgcrypto/px.c b/contrib/pgcrypto/px.c
index 4205e9c3ef..360acbd593 100644
--- a/contrib/pgcrypto/px.c
+++ b/contrib/pgcrypto/px.c
@@ -55,7 +55,6 @@ static const struct error_desc px_err_list[] = {
 	{PXE_ARGUMENT_ERROR, "Illegal argument to function"},
 	{PXE_UNKNOWN_SALT_ALGO, "Unknown salt algorithm"},
 	{PXE_BAD_SALT_ROUNDS, "Incorrect number of rounds"},
-	{PXE_MCRYPT_INTERNAL, "mcrypt internal error"},
 	{PXE_NO_RANDOM, "Failed to generate strong random bits"},
 	{PXE_DECRYPT_FAILED, "Decryption failed"},
 	{PXE_ENCRYPT_FAILED, "Encryption failed"},
diff --git a/contrib/pgcrypto/px.h b/contrib/pgcrypto/px.h
index 17d6f22498..3ed9f711c8 100644
--- a/contrib/pgcrypto/px.h
+++ b/contrib/pgcrypto/px.h
@@ -58,7 +58,7 @@
 #define PXE_ARGUMENT_ERROR			-13
 #define PXE_UNKNOWN_SALT_ALGO		-14
 #define PXE_BAD_SALT_ROUNDS			-15
-#define PXE_MCRYPT_INTERNAL			-16
+/* -16 is unused */
 #define PXE_NO_RANDOM				-17
 #define PXE_DECRYPT_FAILED			-18
 #define PXE_ENCRYPT_FAILED			-19