diff --git a/shell/common/application_info_win.cc b/shell/common/application_info_win.cc
index ad74ba0a7aeec..ef2aa0c9eb419 100644
--- a/shell/common/application_info_win.cc
+++ b/shell/common/application_info_win.cc
@@ -93,8 +93,8 @@ bool IsRunningInDesktopBridgeImpl() {
       }
     }
 
-    UINT32 length;
-    wchar_t packageFamilyName[PACKAGE_FAMILY_NAME_MAX_LENGTH + 1];
+    UINT32 length = PACKAGE_FAMILY_NAME_MAX_LENGTH;
+    wchar_t packageFamilyName[PACKAGE_FAMILY_NAME_MAX_LENGTH];
     HANDLE proc = GetCurrentProcess();
     LONG result =
         (*get_package_family_namePtr)(proc, &length, packageFamilyName);