diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index 1007644..83c750d 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -48,6 +48,12 @@
 #define ATTRIBUTE_NORETURN
 #endif
 
+#if __GNUC__ + 0 >= 8 // clang 20.1.0 does not yet support this
+#define ATTRIBUTE_NONSTRING __attribute__ ((nonstring))
+#else
+#define ATTRIBUTE_NONSTRING
+#endif
+
 /* get these before config.h  for IPv6 stuff... */
 #include <sys/types.h> 
 #include <sys/socket.h>
diff --git a/src/edns0.c b/src/edns0.c
index e867d54..2f03291 100644
--- a/src/edns0.c
+++ b/src/edns0.c
@@ -494,7 +494,7 @@ int check_source(struct dns_header *header, size_t plen, unsigned char *pseudohe
 #define UMBRELLA_DEVICESZ   sizeof(daemon->umbrella_device)
 
 struct umbrella_opt {
-  u8 magic[4];
+  u8 magic[4] ATTRIBUTE_NONSTRING;
   u8 version;
   u8 flags;
   /* We have 4 possible fields since we'll never send both IPv4 and