diff --git a/g2core/device/trinamic/tmc2130.h b/g2core/device/trinamic/tmc2130.h
index ede74331..4681e191 100644
--- a/g2core/device/trinamic/tmc2130.h
+++ b/g2core/device/trinamic/tmc2130.h
@@ -83,7 +83,7 @@ struct Trinamic2130 final : Stepper {
                     uint8_t status;
                 };
                 volatile uint32_t value;
-            };
+            } __attribute__((packed));
         };
     } __attribute__((packed));