diff --git a/shell/common/platform_util_linux.cc b/shell/common/platform_util_linux.cc
index 125b4d037a47..9dd491945548 100644
--- a/shell/common/platform_util_linux.cc
+++ b/shell/common/platform_util_linux.cc
@@ -15,6 +15,7 @@
 
 #include "base/cancelable_callback.h"
 #include "base/containers/contains.h"
+#include "base/containers/map_util.h"
 #include "base/environment.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
@@ -58,6 +59,8 @@ const char kFreedesktopPortalName[] = "org.freedesktop.portal.Desktop";
 const char kFreedesktopPortalPath[] = "/org/freedesktop/portal/desktop";
 const char kFreedesktopPortalOpenURI[] = "org.freedesktop.portal.OpenURI";
 
+const char kOriginalXdgCurrentDesktopEnvVar[] = "ORIGINAL_XDG_CURRENT_DESKTOP";
+
 const char kMethodOpenDirectory[] = "OpenDirectory";
 
 class ShowItemHelper {
@@ -282,6 +285,12 @@ bool XDGUtil(const std::vector<std::string>& argv,
     base::nix::CreateLaunchOptionsWithXdgActivation(base::BindOnce(
         [](base::RepeatingClosure quit_loop, base::LaunchOptions* options_out,
            base::LaunchOptions options) {
+          // Correct the XDG_CURRENT_DESKTOP environment variable before calling
+          // XDG, in case it was changed for compatibility.
+          if (const auto* orig = base::FindOrNull(
+                  options.environment, kOriginalXdgCurrentDesktopEnvVar))
+            options.environment.emplace(base::nix::kXdgCurrentDesktopEnvVar,
+                                        *orig);
           *options_out = std::move(options);
           std::move(quit_loop).Run();
         },