diff --git a/stratosphere/ams_mitm/source/set_mitm/setsys_mitm_service.cpp b/stratosphere/ams_mitm/source/set_mitm/setsys_mitm_service.cpp
index 7f21d3c28..b1b49fe91 100644
--- a/stratosphere/ams_mitm/source/set_mitm/setsys_mitm_service.cpp
+++ b/stratosphere/ams_mitm/source/set_mitm/setsys_mitm_service.cpp
@@ -56,10 +56,18 @@ namespace ams::mitm::settings {
                 const auto api_info = exosphere::GetApiInfo();
                 const char emummc_char = emummc::IsActive() ? 'E' : 'S';
 
+                /* NOTE: While Mesosphere is in experimental/opt-in, we will display it as part of the firmware. */
+                const char mesosphere_char = svc::IsKernelMesosphere() ? 'M' : '0';
+
+                /* TODO: Remove separate display for mesosphere vs not mesosphere in Atmosphere 1.0.0. */
+                AMS_ABORT_UNLESS(api_info.GetMajorVersion() == 0);
+
                 /* NOTE: We have carefully accounted for the size of the string we print. */
                 /* No truncation occurs assuming two-digits for all version number components. */
                 char display_version[sizeof(g_ams_firmware_version.display_version)];
-                std::snprintf(display_version, sizeof(display_version), "%s|AMS %u.%u.%u|%c", g_ams_firmware_version.display_version, api_info.GetMajorVersion(), api_info.GetMinorVersion(), api_info.GetMicroVersion(), emummc_char);
+
+                std::snprintf(display_version, sizeof(display_version), "%s|AMS %c.%u.%u|%c", g_ams_firmware_version.display_version, mesosphere_char, api_info.GetMinorVersion(), api_info.GetMicroVersion(), emummc_char);
+
                 std::memcpy(g_ams_firmware_version.display_version, display_version, sizeof(display_version));
             }
 
diff --git a/stratosphere/creport/source/creport_crash_report.cpp b/stratosphere/creport/source/creport_crash_report.cpp
index 01a468385..9b1b93517 100644
--- a/stratosphere/creport/source/creport_crash_report.cpp
+++ b/stratosphere/creport/source/creport_crash_report.cpp
@@ -351,6 +351,10 @@ namespace ams::creport {
 
     void CrashReport::SaveToFile(ScopedFile &file) {
         file.WriteFormat("Atmosphère Crash Report (v1.5):\n");
+
+        /* TODO: Remove in Atmosphere 1.0.0. */
+        file.WriteFormat("Mesosphere:                      %s\n", svc::IsKernelMesosphere() ? "Enabled" : "Disabled");
+
         file.WriteFormat("Result:                          0x%X (2%03d-%04d)\n\n", this->result.GetValue(), this->result.GetModule(), this->result.GetDescription());
 
         /* Process Info. */
diff --git a/stratosphere/fatal/source/fatal_task_screen.cpp b/stratosphere/fatal/source/fatal_task_screen.cpp
index 327904f9d..1e6730cfa 100644
--- a/stratosphere/fatal/source/fatal_task_screen.cpp
+++ b/stratosphere/fatal/source/fatal_task_screen.cpp
@@ -214,7 +214,9 @@ namespace ams::fatal::srv {
             font::AddSpacingLines(0.5f);
             font::PrintFormatLine(  "Program:  %016lX", static_cast<u64>(this->context->program_id));
             font::AddSpacingLines(0.5f);
-            font::PrintFormatLine("Firmware: %s (Atmosphère %u.%u.%u-%s)", config.GetFirmwareVersion().display_version, ATMOSPHERE_RELEASE_VERSION, ams::GetGitRevision());
+
+            /* TODO: Remove Mesosphere identifier in 1.0.0. */
+            font::PrintFormatLine("Firmware: %s (Atmosphère%s %u.%u.%u-%s)", config.GetFirmwareVersion().display_version, svc::IsKernelMesosphere() ? " M" : "", ATMOSPHERE_RELEASE_VERSION, ams::GetGitRevision());
             font::AddSpacingLines(1.5f);
             if (!exosphere::ResultVersionMismatch::Includes(this->context->result)) {
                 font::Print(config.GetErrorDescription());