diff --git a/core/site_scons/models/T3T1/emulator.py b/core/site_scons/models/T3T1/emulator.py
index e8173defe0..972dd0fb63 100644
--- a/core/site_scons/models/T3T1/emulator.py
+++ b/core/site_scons/models/T3T1/emulator.py
@@ -15,7 +15,7 @@ def configure(
     board = "T3T1/boards/t3t1-unix.h"
     hw_model = get_hw_model_as_number("T3T1")
     hw_revision = 0
-    mcu = "STM32FU585xx"
+    mcu = "STM32U585xx"
 
     if "new_rendering" in features_wanted:
         defines += ["XFRAMEBUFFER", "DISPLAY_RGB565"]