diff --git a/lib/index.cc b/lib/index.cc
index 76830921..f21761d0 100644
--- a/lib/index.cc
+++ b/lib/index.cc
@@ -528,12 +528,11 @@ _index_encrypted_mime_part (notmuch_message_t *message,
 
     notmuch = notmuch_message_get_database (message);
 
-    GMimeCryptoContext* crypto_ctx = NULL;
     bool attempted = false;
     GMimeDecryptResult *decrypt_result = NULL;
     bool get_sk = (notmuch_indexopts_get_decrypt_policy (indexopts) == NOTMUCH_DECRYPT_TRUE);
     clear = _notmuch_crypto_decrypt (&attempted, notmuch_indexopts_get_decrypt_policy (indexopts),
-				     message, crypto_ctx, encrypted_data, get_sk ? &decrypt_result : NULL, &err);
+				     message, encrypted_data, get_sk ? &decrypt_result : NULL, &err);
     if (!attempted)
 	return;
     if (err || !clear) {
diff --git a/mime-node.c b/mime-node.c
index 95dc5132..19744f43 100644
--- a/mime-node.c
+++ b/mime-node.c
@@ -170,8 +170,7 @@ set_signature_list_destructor (mime_node_t *node)
 
 /* Verify a signed mime node */
 static void
-node_verify (mime_node_t *node, GMimeObject *part,
-	     g_mime_3_unused(GMimeCryptoContext *cryptoctx))
+node_verify (mime_node_t *node, GMimeObject *part)
 {
     GError *err = NULL;
 
@@ -191,8 +190,7 @@ node_verify (mime_node_t *node, GMimeObject *part,
 
 /* Decrypt and optionally verify an encrypted mime node */
 static void
-node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
-			 g_mime_3_unused(GMimeCryptoContext *cryptoctx))
+node_decrypt_and_verify (mime_node_t *node, GMimeObject *part)
 {
     GError *err = NULL;
     GMimeDecryptResult *decrypt_result = NULL;
@@ -209,7 +207,7 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject *part,
 	node->decrypted_child = _notmuch_crypto_decrypt (&node->decrypt_attempted,
 							 node->ctx->crypto->decrypt,
 							 message,
-							 cryptoctx, encrypteddata, &decrypt_result, &err);
+							 encrypteddata, &decrypt_result, &err);
     }
     if (! node->decrypted_child) {
 	fprintf (stderr, "Failed to decrypt part: %s\n",
@@ -249,7 +247,6 @@ static mime_node_t *
 _mime_node_create (mime_node_t *parent, GMimeObject *part)
 {
     mime_node_t *node = talloc_zero (parent, mime_node_t);
-    GMimeCryptoContext *cryptoctx = NULL;
 
     /* Set basic node properties */
     node->part = part;
@@ -290,7 +287,7 @@ _mime_node_create (mime_node_t *parent, GMimeObject *part)
 		     "message (must be exactly 2)\n",
 		     node->nchildren);
 	} else {
-	    node_decrypt_and_verify (node, part, cryptoctx);
+	    node_decrypt_and_verify (node, part);
 	}
     } else if (GMIME_IS_MULTIPART_SIGNED (part) && node->ctx->crypto->verify) {
 	if (node->nchildren != 2) {
@@ -299,7 +296,7 @@ _mime_node_create (mime_node_t *parent, GMimeObject *part)
 		     "(must be exactly 2)\n",
 		     node->nchildren);
 	} else {
-	    node_verify (node, part, cryptoctx);
+	    node_verify (node, part);
 	}
     }
 
diff --git a/notmuch-client.h b/notmuch-client.h
index fba28242..d762d3cc 100644
--- a/notmuch-client.h
+++ b/notmuch-client.h
@@ -506,6 +506,6 @@ struct _notmuch_client_indexing_cli_choices {
 extern struct _notmuch_client_indexing_cli_choices indexing_cli_choices;
 extern const notmuch_opt_desc_t  notmuch_shared_indexing_options [];
 notmuch_status_t
-notmuch_process_shared_indexing_options (notmuch_database_t *notmuch, notmuch_config_t *config);
+notmuch_process_shared_indexing_options (notmuch_database_t *notmuch);
 
 #endif
diff --git a/notmuch-insert.c b/notmuch-insert.c
index d229c9dc..327470d4 100644
--- a/notmuch-insert.c
+++ b/notmuch-insert.c
@@ -550,7 +550,7 @@ notmuch_insert_command (notmuch_config_t *config, int argc, char *argv[])
 
     notmuch_exit_if_unmatched_db_uuid (notmuch);
 
-    status = notmuch_process_shared_indexing_options (notmuch, config);
+    status = notmuch_process_shared_indexing_options (notmuch);
     if (status != NOTMUCH_STATUS_SUCCESS) {
 	fprintf (stderr, "Error: Failed to process index options. (%s)\n",
 		 notmuch_status_to_string (status));
diff --git a/notmuch-new.c b/notmuch-new.c
index 6a54a1a1..184e9aa2 100644
--- a/notmuch-new.c
+++ b/notmuch-new.c
@@ -1198,7 +1198,7 @@ notmuch_new_command (notmuch_config_t *config, int argc, char *argv[])
     if (notmuch == NULL)
 	return EXIT_FAILURE;
 
-    status = notmuch_process_shared_indexing_options (notmuch, config);
+    status = notmuch_process_shared_indexing_options (notmuch);
     if (status != NOTMUCH_STATUS_SUCCESS) {
 	fprintf (stderr, "Error: Failed to process index options. (%s)\n",
 		 notmuch_status_to_string (status));
diff --git a/notmuch-reindex.c b/notmuch-reindex.c
index fefa7c63..3139a8c6 100644
--- a/notmuch-reindex.c
+++ b/notmuch-reindex.c
@@ -117,7 +117,7 @@ notmuch_reindex_command (notmuch_config_t *config, int argc, char *argv[])
 
     notmuch_exit_if_unmatched_db_uuid (notmuch);
 
-    status = notmuch_process_shared_indexing_options (notmuch, config);
+    status = notmuch_process_shared_indexing_options (notmuch);
     if (status != NOTMUCH_STATUS_SUCCESS) {
 	fprintf (stderr, "Error: Failed to process index options. (%s)\n",
 		 notmuch_status_to_string (status));
diff --git a/notmuch.c b/notmuch.c
index c11e4cb1..de85041b 100644
--- a/notmuch.c
+++ b/notmuch.c
@@ -112,7 +112,7 @@ const notmuch_opt_desc_t  notmuch_shared_indexing_options [] = {
 
 
 notmuch_status_t
-notmuch_process_shared_indexing_options (notmuch_database_t *notmuch, g_mime_3_unused(notmuch_config_t *config))
+notmuch_process_shared_indexing_options (notmuch_database_t *notmuch)
 {
     if (indexing_cli_choices.opts == NULL)
 	indexing_cli_choices.opts = notmuch_database_get_default_indexopts (notmuch);
diff --git a/util/crypto.c b/util/crypto.c
index 8104263d..ba67d4f4 100644
--- a/util/crypto.c
+++ b/util/crypto.c
@@ -32,7 +32,6 @@ GMimeObject *
 _notmuch_crypto_decrypt (bool *attempted,
 			 notmuch_decryption_policy_t decrypt,
 			 notmuch_message_t *message,
-			 g_mime_3_unused(GMimeCryptoContext* crypto_ctx),
 			 GMimeMultipartEncrypted *part,
 			 GMimeDecryptResult **decrypt_result,
 			 GError **err)
diff --git a/util/crypto.h b/util/crypto.h
index dbb333eb..af3998e8 100644
--- a/util/crypto.h
+++ b/util/crypto.h
@@ -18,7 +18,6 @@ GMimeObject *
 _notmuch_crypto_decrypt (bool *attempted,
 			 notmuch_decryption_policy_t decrypt,
 			 notmuch_message_t *message,
-			 GMimeCryptoContext* crypto_ctx,
 			 GMimeMultipartEncrypted *part,
 			 GMimeDecryptResult **decrypt_result,
 			 GError **err);
diff --git a/util/gmime-extra.h b/util/gmime-extra.h
index c17fa8fb..60ae8765 100644
--- a/util/gmime-extra.h
+++ b/util/gmime-extra.h
@@ -34,8 +34,6 @@ typedef GMimeAddressType GMimeRecipientType;
 
 typedef GMimeSignatureStatus GMimeSignatureError;
 
-#define g_mime_3_unused(arg) unused(arg)
-
 /**
  * Get last 16 hex digits of fingerprint ("keyid")
  */