diff --git a/command-line-arguments.c b/command-line-arguments.c
index d64aa85b..6699c521 100644
--- a/command-line-arguments.c
+++ b/command-line-arguments.c
@@ -78,7 +78,7 @@ _process_boolean_arg (const notmuch_opt_desc_t *arg_desc, char next,
 	return OPT_FAILED;
     }
 
-    *arg_desc->opt_bool = negate ? !value : value;
+    *arg_desc->opt_bool = negate ? (! value) : value;
 
     return OPT_OK;
 }
@@ -120,13 +120,13 @@ _process_string_arg (const notmuch_opt_desc_t *arg_desc, char next, const char *
 static int _opt_set_count (const notmuch_opt_desc_t *opt_desc)
 {
     return
-	!!opt_desc->opt_inherit +
-	!!opt_desc->opt_bool +
-	!!opt_desc->opt_int +
-	!!opt_desc->opt_keyword +
-	!!opt_desc->opt_flags +
-	!!opt_desc->opt_string +
-	!!opt_desc->opt_position;
+	(bool) opt_desc->opt_inherit +
+	(bool) opt_desc->opt_bool +
+	(bool) opt_desc->opt_int +
+	(bool) opt_desc->opt_keyword +
+	(bool) opt_desc->opt_flags +
+	(bool) opt_desc->opt_string +
+	(bool) opt_desc->opt_position;
 }
 
 /* Return true if opt_desc is valid. */
diff --git a/mime-node.c b/mime-node.c
index a93cbb31..4ca51fe9 100644
--- a/mime-node.c
+++ b/mime-node.c
@@ -185,8 +185,8 @@ node_verify (mime_node_t *node, GMimeObject *part)
     notmuch_status_t status;
 
     node->verify_attempted = true;
-    node->sig_list = g_mime_multipart_signed_verify
-	(GMIME_MULTIPART_SIGNED (part), GMIME_ENCRYPT_NONE, &err);
+    node->sig_list = g_mime_multipart_signed_verify (
+	GMIME_MULTIPART_SIGNED (part), GMIME_ENCRYPT_NONE, &err);
 
     if (node->sig_list)
 	set_signature_list_destructor (node);
@@ -342,8 +342,8 @@ mime_node_child (mime_node_t *parent, int child)
 	if (child == GMIME_MULTIPART_ENCRYPTED_CONTENT && parent->decrypted_child)
 	    sub = parent->decrypted_child;
 	else
-	    sub = g_mime_multipart_get_part
-		(GMIME_MULTIPART (parent->part), child);
+	    sub = g_mime_multipart_get_part (
+		GMIME_MULTIPART (parent->part), child);
     } else if (GMIME_IS_MESSAGE (parent->part)) {
 	sub = g_mime_message_get_mime_part (GMIME_MESSAGE (parent->part));
     } else {
diff --git a/notmuch-search.c b/notmuch-search.c
index e2dee418..e3a85617 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -752,8 +752,8 @@ _notmuch_search_prepare (search_context_t *ctx, notmuch_config_t *config, int ar
 	size_t search_exclude_tags_length;
 	notmuch_status_t status;
 
-	search_exclude_tags = notmuch_config_get_search_exclude_tags
-	    (config, &search_exclude_tags_length);
+	search_exclude_tags = notmuch_config_get_search_exclude_tags (
+	    config, &search_exclude_tags_length);
 
 	for (i = 0; i < search_exclude_tags_length; i++) {
 	    status = notmuch_query_add_tag_exclude (ctx->query, search_exclude_tags[i]);
diff --git a/notmuch-show.c b/notmuch-show.c
index 4dfe9c1d..bce7d827 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -490,8 +490,8 @@ format_part_text (const void *ctx, sprinter_t *sp, mime_node_t *node,
 {
     /* The disposition and content-type metadata are associated with
      * the envelope for message parts */
-    GMimeObject *meta = node->envelope_part ?
-	GMIME_OBJECT (node->envelope_part) : node->part;
+    GMimeObject *meta = node->envelope_part ? (
+	GMIME_OBJECT (node->envelope_part) ) : node->part ;
     GMimeContentType *content_type = g_mime_object_get_content_type (meta);
     const bool leaf = GMIME_IS_PART (node->part);
     GMimeStream *stream = params->out_stream;
@@ -513,8 +513,8 @@ format_part_text (const void *ctx, sprinter_t *sp, mime_node_t *node,
 	char *content_string;
 	const char *disposition = _get_disposition (meta);
 	const char *cid = g_mime_object_get_content_id (meta);
-	const char *filename = leaf ?
-	    g_mime_part_get_filename (GMIME_PART (node->part)) : NULL;
+	const char *filename = leaf ? (
+	    g_mime_part_get_filename (GMIME_PART (node->part)) ) : NULL ;
 
 	if (disposition &&
 	    strcasecmp (disposition, GMIME_DISPOSITION_ATTACHMENT) == 0)
@@ -688,14 +688,14 @@ format_part_sprinter (const void *ctx, sprinter_t *sp, mime_node_t *node,
 
     /* The disposition and content-type metadata are associated with
      * the envelope for message parts */
-    GMimeObject *meta = node->envelope_part ?
-	GMIME_OBJECT (node->envelope_part) : node->part;
+    GMimeObject *meta = node->envelope_part ? (
+	GMIME_OBJECT (node->envelope_part) ): node->part;
     GMimeContentType *content_type = g_mime_object_get_content_type (meta);
     char *content_string;
     const char *disposition = _get_disposition (meta);
     const char *cid = g_mime_object_get_content_id (meta);
-    const char *filename = GMIME_IS_PART (node->part) ?
-	g_mime_part_get_filename (GMIME_PART (node->part)) : NULL;
+    const char *filename = GMIME_IS_PART (node->part) ? (
+	g_mime_part_get_filename (GMIME_PART (node->part) ) ) : NULL;
     int nclose = 0;
     int i;