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diff --git a/compat/arc4_lock.c b/compat/arc4_lock.c
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index 0c45ad0..7fb9cdc 100644
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--- a/compat/arc4_lock.c
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+++ b/compat/arc4_lock.c
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@@ -32,7 +32,7 @@
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  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  */
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 #include "config.h"
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-#define LOCKRET(func) func
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+#define LOCKRET(func) (void)func
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 #include "util/locks.h"
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 void _ARC4_LOCK(void);
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diff --git a/daemon/remote.c b/daemon/remote.c
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index 243d94c..a377aca 100644
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--- a/daemon/remote.c
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+++ b/daemon/remote.c
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@@ -371,7 +371,9 @@ add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
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 					  (unsigned)cfg_uid, (unsigned)cfg_gid,
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 					  ip, strerror(errno));
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 			}
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-			chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP));
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+			if (chmod(ip, (mode_t)(S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP)) == -1)
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+				verbose(VERB_QUERY, "cannot chmod %s: %s",
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+					ip, strerror(errno));
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 #else
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 			(void)cfg;
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 #endif
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@@ -387,7 +389,7 @@ add_open(const char* ip, int nr, struct listen_port** list, int noproto_is_err,
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 			}
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 #endif /* USE_WINSOCK */
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 			log_err("control interface %s:%s getaddrinfo: %s %s",
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-				ip?ip:"default", port, gai_strerror(r),
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+				ip, port, gai_strerror(r),
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 #ifdef EAI_SYSTEM
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 				r==EAI_SYSTEM?(char*)strerror(errno):""
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 #else
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diff --git a/iterator/iter_scrub.c b/iterator/iter_scrub.c
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index 1bee85c..6bdfe41 100644
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--- a/iterator/iter_scrub.c
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+++ b/iterator/iter_scrub.c
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@@ -437,7 +437,6 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
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 					rrset->rrset_all_next =
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 						nx->rrset_all_next;
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 					nx->rrset_all_next = rrset;
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-					prev = nx;
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 				}
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 			}
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diff --git a/services/listen_dnsport.c b/services/listen_dnsport.c
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index 3b53676..36c67c6 100644
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--- a/services/listen_dnsport.c
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+++ b/services/listen_dnsport.c
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@@ -1072,11 +1072,11 @@ ports_create_if(const char* ifname, int do_auto, int do_udp, int do_tcp,
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 {
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 	int s, noip6=0;
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 #ifdef USE_DNSCRYPT
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-	int is_dnscrypt = ((strchr(ifname, '@') && 
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+	const int is_dnscrypt = ((strchr(ifname, '@') &&
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 			atoi(strchr(ifname, '@')+1) == dnscrypt_port) ||
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 			(!strchr(ifname, '@') && atoi(port) == dnscrypt_port));
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 #else
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-	int is_dnscrypt = 0;
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+	const int is_dnscrypt = 0;
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 	(void)dnscrypt_port;
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 #endif
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diff --git a/services/localzone.c b/services/localzone.c
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index 6bde432..00d044a 100644
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--- a/services/localzone.c
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+++ b/services/localzone.c
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@@ -1079,7 +1079,7 @@ local_zones_tags_lookup(struct local_zones* zones,
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 	key.name = name;
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 	key.namelen = len;
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 	key.namelabs = labs;
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-	rbtree_find_less_equal(&zones->ztree, &key, &res);
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+	(void)rbtree_find_less_equal(&zones->ztree, &key, &res);
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 	result = (struct local_zone*)res;
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 	/* exact or smaller element (or no element) */
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 	if(!result || result->dclass != dclass)
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diff --git a/smallapp/unbound-host.c b/smallapp/unbound-host.c
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index d7a36a2..68f789a 100644
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--- a/smallapp/unbound-host.c
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+++ b/smallapp/unbound-host.c
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@@ -330,6 +330,7 @@ pretty_output(char* q, int t, int c, struct ub_result* result, int docname)
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 					exit(1);
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 				}
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 				printf("%s\n", s);
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+				free(s);
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 			} else	printf(" has no %s record", tstr);
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 			printf(" %s\n", secstatus);
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 		}