diff --git a/src/libnm-glib-aux/nm-macros-internal.h b/src/libnm-glib-aux/nm-macros-internal.h
index edaa6f3902..39197ecf3a 100644
--- a/src/libnm-glib-aux/nm-macros-internal.h
+++ b/src/libnm-glib-aux/nm-macros-internal.h
@@ -1136,6 +1136,18 @@ nm_clear_g_variant(GVariant **variant)
     return FALSE;
 }
 
+static inline gboolean
+nm_clear_g_string(GString **ptr)
+{
+    GString *s;
+
+    if (ptr && (s = *ptr)) {
+        *ptr = NULL;
+        g_string_free(s, TRUE);
+    };
+    return FALSE;
+}
+
 static inline gboolean
 nm_clear_g_cancellable(GCancellable **cancellable)
 {