diff --git a/cmd/ifparse.c b/cmd/ifparse.c
index d39379b..e8c0535 100644
--- a/cmd/ifparse.c
+++ b/cmd/ifparse.c
@@ -131,7 +131,7 @@ pp_impl_cmp(const void *a, const void *b)
 	return strcmp(key, impl->name);
 }
 
-int
+static int
 ifparse_main(int argc, char *argv[])
 {
 	struct lif_dict state = {};
diff --git a/cmd/ifquery.c b/cmd/ifquery.c
index 5931db9..86a3f64 100644
--- a/cmd/ifquery.c
+++ b/cmd/ifquery.c
@@ -22,7 +22,7 @@
 #include "cmd/multicall.h"
 #include "cmd/pretty-print-iface.h"
 
-void
+static void
 print_interface_dot(struct lif_dict *collection, struct lif_interface *iface, struct lif_interface *parent)
 {
 	if (!lif_lifecycle_query_dependents(&exec_opts, iface, iface->ifname))
@@ -57,7 +57,7 @@ print_interface_dot(struct lif_dict *collection, struct lif_interface *iface, st
 	}
 }
 
-void
+static void
 print_interface_property(struct lif_interface *iface, const char *property)
 {
 	struct lif_node *iter;
@@ -83,7 +83,7 @@ print_interface_property(struct lif_interface *iface, const char *property)
 	}
 }
 
-void
+static void
 list_interfaces(struct lif_dict *collection, struct match_options *opts)
 {
 	struct lif_node *iter;
@@ -126,7 +126,7 @@ list_interfaces(struct lif_dict *collection, struct match_options *opts)
 static bool listing = false, listing_stat = false, listing_running = false;
 static bool allow_undefined = false;
 
-void
+static void
 list_state(struct lif_dict *state, struct match_options *opts)
 {
 	struct lif_node *iter;
@@ -217,7 +217,7 @@ static struct if_option_group local_option_group = {
 	.group = local_options
 };
 
-int
+static int
 ifquery_main(int argc, char *argv[])
 {
 	struct lif_dict state = {};
diff --git a/cmd/ifupdown.c b/cmd/ifupdown.c
index 1d39cd5..7ac3c88 100644
--- a/cmd/ifupdown.c
+++ b/cmd/ifupdown.c
@@ -27,7 +27,7 @@
 
 static bool up;
 
-bool
+static bool
 is_ifdown()
 {
 	if (strstr(argv0, "ifdown") != NULL)
@@ -36,7 +36,7 @@ is_ifdown()
 	return false;
 }
 
-int
+static int
 acquire_state_lock(const char *state_path, const char *lifname)
 {
 	if (exec_opts.mock || exec_opts.no_lock)
@@ -94,7 +94,7 @@ acquire_state_lock(const char *state_path, const char *lifname)
 	return fd;
 }
 
-bool
+static bool
 skip_interface(struct lif_interface *iface, const char *ifname, struct lif_dict *state, bool update_state)
 {
 	if (iface->is_template)
@@ -146,7 +146,7 @@ skip_interface(struct lif_interface *iface, const char *ifname, struct lif_dict
 	return false;
 }
 
-bool
+static bool
 change_interface(struct lif_interface *iface, struct lif_dict *collection, struct lif_dict *state, const char *ifname, bool update_state)
 {
 	int lockfd = acquire_state_lock(exec_opts.state_file, ifname);
@@ -194,7 +194,7 @@ change_interface(struct lif_interface *iface, struct lif_dict *collection, struc
 	return true;
 }
 
-bool
+static bool
 change_auto_interfaces(struct lif_dict *collection, struct lif_dict *state, struct match_options *opts)
 {
 	struct lif_node *iter;
@@ -222,7 +222,7 @@ change_auto_interfaces(struct lif_dict *collection, struct lif_dict *state, stru
 	return true;
 }
 
-int
+static int
 update_state_file_and_exit(int rc, struct lif_dict *state)
 {
 	if (exec_opts.mock)
@@ -243,7 +243,7 @@ update_state_file_and_exit(int rc, struct lif_dict *state)
 	return rc;
 }
 
-int
+static int
 ifupdown_main(int argc, char *argv[])
 {
 	up = !is_ifdown();
diff --git a/cmd/multicall.c b/cmd/multicall.c
index 653181a..7c3c849 100644
--- a/cmd/multicall.c
+++ b/cmd/multicall.c
@@ -62,7 +62,7 @@ struct if_applet *applet_table[] = {
 	&ifupdown_applet,
 };
 
-int
+static int
 applet_cmp(const void *a, const void *b)
 {
 	const char *key = a;
@@ -101,7 +101,7 @@ main(int argc, char *argv[])
 	return self_applet->main(argc, argv);
 }
 
-int
+static int
 multicall_main(int argc, char *argv[])
 {
 	if (argc < 2)