diff --git a/src/main/drivers/bus_i2c_stm32f30x.c b/src/main/drivers/bus_i2c_stm32f30x.c
index d39f74f7bf..915e295480 100644
--- a/src/main/drivers/bus_i2c_stm32f30x.c
+++ b/src/main/drivers/bus_i2c_stm32f30x.c
@@ -87,7 +87,7 @@ typedef struct i2cBusState_s {
     I2CDevice       device;
     bool            initialized;
     i2cState_t      state;
-    uint32_t        timeout;
+    timeUs_t        timeout;
 
     /* Active transfer */
     bool                        allowRawAccess;
diff --git a/src/main/drivers/bus_i2c_stm32f40x.c b/src/main/drivers/bus_i2c_stm32f40x.c
index 0f4d8b45d8..ae96d65f15 100644
--- a/src/main/drivers/bus_i2c_stm32f40x.c
+++ b/src/main/drivers/bus_i2c_stm32f40x.c
@@ -121,7 +121,7 @@ typedef struct i2cBusState_s {
     I2CDevice       device;
     bool            initialized;
     i2cState_t      state;
-    uint32_t        timeout;
+    timeUs_t        timeout;
 
     /* Active transfer */
     bool                        allowRawAccess;