diff --git a/gfx/ycbcr/chromium_types.h b/gfx/ycbcr/chromium_types.h
index dceac4766e07..13f92975b57f 100644
--- a/gfx/ycbcr/chromium_types.h
+++ b/gfx/ycbcr/chromium_types.h
@@ -39,7 +39,7 @@
 #define ARCH_CPU_SPARC_FAMILY 1
 #define ARCH_CPU_SPARC 1
 #define ARCH_CPU_64_BITS 1
-#elif defined(__aarch64__)
+#elif defined(__aarch64__) || defined(_M_ARM64)
 #define ARCH_CPU_AARCH64_FAMILY 1
 #define ARCH_CPU_AARCH64 1
 #define ARCH_CPU_64_BITS 1