diff --git a/src/libnm-glib-aux/nm-secret-utils.h b/src/libnm-glib-aux/nm-secret-utils.h
index 226d77ffd7..513dbca5bc 100644
--- a/src/libnm-glib-aux/nm-secret-utils.h
+++ b/src/libnm-glib-aux/nm-secret-utils.h
@@ -20,6 +20,22 @@ char *nm_secret_strchomp(char *secret);
 
 void nm_free_secret(char *secret);
 
+static inline gboolean
+nm_strdup_reset_secret(char **dst, const char *src)
+{
+    char *old;
+
+    nm_assert(dst);
+
+    if (nm_streq0(*dst, src))
+        return FALSE;
+    old  = *dst;
+    *dst = src ? g_strdup(src) : NULL;
+    if (old)
+        nm_free_secret(old);
+    return TRUE;
+}
+
 NM_AUTO_DEFINE_FCN0(char *, _nm_auto_free_secret, nm_free_secret);
 /**
  * nm_auto_free_secret: