diff --git a/src/main/drivers/bus_i2c_stm32f10x.c b/src/main/drivers/bus_i2c_stm32f10x.c
index f9882169f..b72b30720 100644
--- a/src/main/drivers/bus_i2c_stm32f10x.c
+++ b/src/main/drivers/bus_i2c_stm32f10x.c
@@ -99,11 +99,11 @@ static i2cState_t i2cState[] = {
     { false, false, false, 0, 0, 0, 0, 0, 0, 0 }
 };
 
-static bool i2cOverClock;
-
 void i2cSetOverclock(uint8_t overClock)
 {
-    i2cOverClock = overClock ? true : false;
+    for (unsigned int i = 0; i < sizeof(i2cHardwareMap) / sizeof(i2cHardwareMap[0]); i++) {
+        i2cHardwareMap[i].overClock = overClock;
+    }
 }
 
 void I2C1_ER_IRQHandler(void) {
diff --git a/src/main/drivers/bus_i2c_stm32f30x.c b/src/main/drivers/bus_i2c_stm32f30x.c
index 531b43187..9434b09e8 100644
--- a/src/main/drivers/bus_i2c_stm32f30x.c
+++ b/src/main/drivers/bus_i2c_stm32f30x.c
@@ -70,11 +70,11 @@ static bool deviceInitialised[] = {
     false
 };
 
-static bool i2cOverClock;
-
 void i2cSetOverclock(uint8_t overClock)
 {
-    i2cOverClock = overClock ? true : false;
+    for (unsigned i = 0; i < sizeof(i2cHardwareMap) / sizeof(i2cHardwareMap[0]); i++) {
+        i2cHardwareMap[i].overClock = overClock;
+    }
 }
 
 ///////////////////////////////////////////////////////////////////////////////