diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c
index 3adf1cef5c..d127443c4c 100644
--- a/src/libsystemd/sd-login/sd-login.c
+++ b/src/libsystemd/sd-login/sd-login.c
@@ -999,7 +999,7 @@ _public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) {
 
 _public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) {
         if (m)
-                close_nointr(MONITOR_TO_FD(m));
+                (void) close_nointr(MONITOR_TO_FD(m));
 
         return NULL;
 }
diff --git a/src/libsystemd/sd-network/sd-network.c b/src/libsystemd/sd-network/sd-network.c
index 7273a77156..ee93dae9e3 100644
--- a/src/libsystemd/sd-network/sd-network.c
+++ b/src/libsystemd/sd-network/sd-network.c
@@ -444,7 +444,7 @@ _public_ int sd_network_monitor_new(sd_network_monitor **m, const char *category
 
 _public_ sd_network_monitor* sd_network_monitor_unref(sd_network_monitor *m) {
         if (m)
-                close_nointr(MONITOR_TO_FD(m));
+                (void) close_nointr(MONITOR_TO_FD(m));
 
         return NULL;
 }
diff --git a/src/login/logind-session-device.c b/src/login/logind-session-device.c
index f2adb969d4..1c4d543889 100644
--- a/src/login/logind-session-device.c
+++ b/src/login/logind-session-device.c
@@ -141,7 +141,7 @@ static int session_device_open(SessionDevice *sd, bool active) {
                          * that so fail at all times and let caller retry in inactive state. */
                         r = sd_drmsetmaster(fd);
                         if (r < 0) {
-                                close_nointr(fd);
+                                (void) close_nointr(fd);
                                 return r;
                         }
                 } else