diff --git a/src/stm32/i2c.c b/src/stm32/i2c.c
index d9583694..f5bbd01d 100644
--- a/src/stm32/i2c.c
+++ b/src/stm32/i2c.c
@@ -23,7 +23,7 @@ DECL_ENUMERATION("i2c_bus", "i2c1a", 1);
 DECL_CONSTANT_STR("BUS_PINS_i2c1a", "PB8,PB9");
 DECL_ENUMERATION("i2c_bus", "i2c2", 2);
 DECL_CONSTANT_STR("BUS_PINS_i2c2", "PB10,PB11");
-#if CONFIG_MACH_STM32F2 || CONFIG_MACH_STM324
+#if CONFIG_MACH_STM32F2 || CONFIG_MACH_STM32F4
 DECL_ENUMERATION("i2c_bus", "i2c3", 3);
 DECL_CONSTANT_STR("BUS_PINS_i2c3", "PA8,PC9");
   #if CONFIG_MACH_STM32F2 || CONFIG_MACH_STM32F4x5
@@ -38,7 +38,7 @@ static const struct i2c_info i2c_bus[] = {
     { I2C1, GPIO('B', 6), GPIO('B', 7) },
     { I2C1, GPIO('B', 8), GPIO('B', 9) },
     { I2C2, GPIO('B', 10), GPIO('B', 11) },
-#if CONFIG_MACH_STM32F2 || CONFIG_MACH_STM324
+#if CONFIG_MACH_STM32F2 || CONFIG_MACH_STM32F4
     { I2C3, GPIO('A', 8), GPIO('C', 9) },
   #if CONFIG_MACH_STM32F2 || CONFIG_MACH_STM32F4x5
     { I2C2, GPIO('H', 4), GPIO('H', 5) },