diff --git a/config.def.h b/config.def.h
index 3976a23c1bc6..89d0fa4ab2a1 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1849,6 +1849,9 @@
 #define DEFAULT_BUILDBOT_SERVER_URL "http://buildbot.libretro.com/nightly/windows/x86_64/latest/"
 #elif defined(__i386__) || defined(__i486__) || defined(__i686__) || defined(_M_IX86) || defined(_M_IA64)
 #define DEFAULT_BUILDBOT_SERVER_URL "http://buildbot.libretro.com/nightly/windows/x86/latest/"
+#elif defined(__aarch64__) || defined(_M_ARM64)
+/* No official MinGW/clang ARM64 buildbot yet – use empty default */
+#define DEFAULT_BUILDBOT_SERVER_URL ""
 #endif
 #endif
 #elif defined(__linux__)
diff --git a/deps/mbedtls/timing.c b/deps/mbedtls/timing.c
index 2ca0f75ecc53..f32e4c81f543 100644
--- a/deps/mbedtls/timing.c
+++ b/deps/mbedtls/timing.c
@@ -43,6 +43,13 @@
 #include <windows.h>
 #include <winbase.h>
 
+#if defined(__MINGW32__) || defined(__MINGW64__)
+/* MSYS2/MinGW: provide struct timeval + gettimeofday() for the
+ * fallback timing implementation used when HAVE_HARDCLOCK
+ * isn't defined (e.g., on aarch64-w64-mingw32 / clangarm64). */
+#include <sys/time.h>
+#endif
+
 struct _hr_time
 {
     LARGE_INTEGER start;