diff --git a/include/libopencm3/stm32/common/i2c_common_v2.h b/include/libopencm3/stm32/common/i2c_common_v2.h
index 1f915c7f..740de632 100644
--- a/include/libopencm3/stm32/common/i2c_common_v2.h
+++ b/include/libopencm3/stm32/common/i2c_common_v2.h
@@ -406,7 +406,6 @@ void i2c_set_scl_high_period(uint32_t i2c, uint8_t period);
 void i2c_set_scl_low_period(uint32_t i2c, uint8_t period);
 void i2c_enable_stretching(uint32_t i2c);
 void i2c_disable_stretching(uint32_t i2c);
-void i2c_100khz_i2cclk8mhz(uint32_t i2c);
 void i2c_set_7bit_addr_mode(uint32_t i2c);
 void i2c_set_10bit_addr_mode(uint32_t i2c);
 void i2c_set_7bit_address(uint32_t i2c, uint8_t addr);
diff --git a/lib/stm32/common/i2c_common_v2.c b/lib/stm32/common/i2c_common_v2.c
index a4a69c7f..9f0d795c 100644
--- a/lib/stm32/common/i2c_common_v2.c
+++ b/lib/stm32/common/i2c_common_v2.c
@@ -234,15 +234,6 @@ void i2c_disable_stretching(uint32_t i2c)
 	I2C_CR1(i2c) |= I2C_CR1_NOSTRETCH;
 }
 
-void i2c_100khz_i2cclk8mhz(uint32_t i2c)
-{
-	i2c_set_prescaler(i2c, 1);
-	i2c_set_scl_low_period(i2c, 0x13);
-	i2c_set_scl_high_period(i2c, 0xF);
-	i2c_set_data_hold_time(i2c, 0x2);
-	i2c_set_data_setup_time(i2c, 0x4);
-}
-
 void i2c_set_7bit_addr_mode(uint32_t i2c)
 {
 	I2C_CR2(i2c) &= ~I2C_CR2_ADD10;