diff --git a/lib/cache/lvmetad.c b/lib/cache/lvmetad.c
index c1eb4aa6e..d0c4a4d89 100644
--- a/lib/cache/lvmetad.c
+++ b/lib/cache/lvmetad.c
@@ -124,7 +124,7 @@ void lvmetad_set_token(const struct dm_config_value *filter)
 		filter = filter->next;
 	}
 
-	if (!dm_asprintf(&_lvmetad_token, "filter:%u", ft))
+	if (dm_asprintf(&_lvmetad_token, "filter:%u", ft) < 0)
 		log_warn("WARNING: Failed to set lvmetad token. Out of memory?");
 }
 
diff --git a/tools/pvscan.c b/tools/pvscan.c
index 4121c7b02..ac43295ab 100644
--- a/tools/pvscan.c
+++ b/tools/pvscan.c
@@ -166,7 +166,7 @@ static int _clear_dev_from_lvmetad_cache(dev_t devno, int32_t major, int32_t min
 {
 	char *buf;
 
-	if (!dm_asprintf(&buf, "%" PRIi32 ":%" PRIi32, major, minor))
+	if (dm_asprintf(&buf, "%" PRIi32 ":%" PRIi32, major, minor) < 0)
 		stack;
 	if (!lvmetad_pv_gone(devno, buf ? : "", handler)) {
 		dm_free(buf);