diff --git a/src/common/platform/win32/i_main.cpp b/src/common/platform/win32/i_main.cpp
index f153a1dac..c28a3ff4b 100644
--- a/src/common/platform/win32/i_main.cpp
+++ b/src/common/platform/win32/i_main.cpp
@@ -85,6 +85,8 @@
 // The main window's title.
 #ifdef _M_X64
 #define X64 " 64-bit"
+#elif _M_ARM64
+#define X64 " ARM-64"
 #else
 #define X64 ""
 #endif
diff --git a/src/common/platform/win32/i_mainwindow.cpp b/src/common/platform/win32/i_mainwindow.cpp
index 3395ec430..5b246e457 100644
--- a/src/common/platform/win32/i_mainwindow.cpp
+++ b/src/common/platform/win32/i_mainwindow.cpp
@@ -17,6 +17,8 @@
 
 #ifdef _M_X64
 #define X64 " 64-bit"
+#elif _M_ARM64
+#define X64 " ARM-64"
 #else
 #define X64 ""
 #endif