diff --git a/src/config.c b/src/config.c
index 8e327be..93525fb 100644
--- a/src/config.c
+++ b/src/config.c
@@ -310,7 +310,7 @@ static inline bool parse_allowedips(struct wgpeer *peer, struct wgallowedip **la
 		saved_entry = strdup(mask);
 		ip = strsep(&mask, "/");
 
-		new_allowedip = calloc(1, sizeof(struct wgallowedip));
+		new_allowedip = calloc(1, sizeof(*new_allowedip));
 		if (!new_allowedip) {
 			perror("calloc");
 			free(saved_entry);
@@ -464,8 +464,8 @@ out:
 
 bool config_read_init(struct config_ctx *ctx, bool append)
 {
-	memset(ctx, 0, sizeof(struct config_ctx));
-	ctx->device = calloc(1, sizeof(struct wgdevice));
+	memset(ctx, 0, sizeof(*ctx));
+	ctx->device = calloc(1, sizeof(*ctx->device));
 	if (!ctx->device) {
 		perror("calloc");
 		return false;
@@ -511,7 +511,7 @@ static char *strip_spaces(const char *in)
 
 struct wgdevice *config_read_cmd(char *argv[], int argc)
 {
-	struct wgdevice *device = calloc(1, sizeof(struct wgdevice));
+	struct wgdevice *device = calloc(1, sizeof(*device));
 	struct wgpeer *peer = NULL;
 	struct wgallowedip *allowedip = NULL;
 
@@ -537,7 +537,7 @@ struct wgdevice *config_read_cmd(char *argv[], int argc)
 			argv += 2;
 			argc -= 2;
 		} else if (!strcmp(argv[0], "peer") && argc >= 2) {
-			struct wgpeer *new_peer = calloc(1, sizeof(struct wgpeer));
+			struct wgpeer *new_peer = calloc(1, sizeof(*new_peer));
 
 			allowedip = NULL;
 			if (!new_peer) {
diff --git a/src/ipc.c b/src/ipc.c
index 06590e2..e3ef789 100644
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -294,7 +294,7 @@ static int userspace_get_device(struct wgdevice **out, const char *interface)
 	FILE *f;
 	int ret = -EPROTO;
 
-	*out = dev = calloc(1, sizeof(struct wgdevice));
+	*out = dev = calloc(1, sizeof(*dev));
 	if (!dev)
 		return -errno;
 
@@ -332,7 +332,7 @@ static int userspace_get_device(struct wgdevice **out, const char *interface)
 			dev->fwmark = NUM(0xffffffffU);
 			dev->flags |= WGDEVICE_HAS_FWMARK;
 		} else if (!strcmp(key, "public_key")) {
-			struct wgpeer *new_peer = calloc(1, sizeof(struct wgpeer));
+			struct wgpeer *new_peer = calloc(1, sizeof(*new_peer));
 
 			if (!new_peer) {
 				ret = -ENOMEM;
@@ -398,7 +398,7 @@ static int userspace_get_device(struct wgdevice **out, const char *interface)
 
 			if (!mask || !isdigit(mask[0]))
 				break;
-			new_allowedip = calloc(1, sizeof(struct wgallowedip));
+			new_allowedip = calloc(1, sizeof(*new_allowedip));
 			if (!new_allowedip) {
 				ret = -ENOMEM;
 				goto err;
@@ -708,7 +708,7 @@ static int parse_allowedip(const struct nlattr *attr, void *data)
 static int parse_allowedips(const struct nlattr *attr, void *data)
 {
 	struct wgpeer *peer = data;
-	struct wgallowedip *new_allowedip = calloc(1, sizeof(struct wgallowedip));
+	struct wgallowedip *new_allowedip = calloc(1, sizeof(*new_allowedip));
 	int ret;
 
 	if (!new_allowedip) {
@@ -787,7 +787,7 @@ static int parse_peer(const struct nlattr *attr, void *data)
 static int parse_peers(const struct nlattr *attr, void *data)
 {
 	struct wgdevice *device = data;
-	struct wgpeer *new_peer = calloc(1, sizeof(struct wgpeer));
+	struct wgpeer *new_peer = calloc(1, sizeof(*new_peer));
 	int ret;
 
 	if (!new_peer) {
@@ -886,7 +886,7 @@ static int kernel_get_device(struct wgdevice **device, const char *interface)
 	struct mnlg_socket *nlg;
 
 try_again:
-	*device = calloc(1, sizeof(struct wgdevice));
+	*device = calloc(1, sizeof(**device));
 	if (!*device)
 		return -errno;
 
diff --git a/src/show.c b/src/show.c
index b7f665c..9f98286 100644
--- a/src/show.c
+++ b/src/show.c
@@ -53,12 +53,12 @@ static void sort_peers(struct wgdevice *device)
 		++peer_count;
 	if (!peer_count)
 		return;
-	peers = calloc(peer_count, sizeof(struct wgpeer *));
+	peers = calloc(peer_count, sizeof(*peers));
 	if (!peers)
 		return;
 	for_each_wgpeer(device, peer)
 		peers[i++] = peer;
-	qsort(peers, peer_count, sizeof(struct wgpeer *), peer_cmp);
+	qsort(peers, peer_count, sizeof(*peers), peer_cmp);
 	device->first_peer = peers[0];
 	peers[0]->next_peer = NULL;
 	for (i = 1; i < peer_count; ++i) {