diff --git a/boards/arm/kinetis/teensy-3.x/src/k20_i2c.c b/boards/arm/kinetis/teensy-3.x/src/k20_i2c.c
index db1e2e579e0..543f4679c92 100644
--- a/boards/arm/kinetis/teensy-3.x/src/k20_i2c.c
+++ b/boards/arm/kinetis/teensy-3.x/src/k20_i2c.c
@@ -53,7 +53,7 @@
 
 void kinetis_i2cdev_initialize(void)
 {
-  i2c_dev = NULL;
+  FAR struct i2c_master_s *i2c_dev = NULL;
 
 #if defined(CONFIG_KINETIS_I2C0)
   i2c_dev = kinetis_i2cbus_initialize(0);
diff --git a/boards/arm/kinetis/teensy-3.x/src/teensy-3x.h b/boards/arm/kinetis/teensy-3.x/src/teensy-3x.h
index 3f9f8b3e8e7..de73cc9ff95 100644
--- a/boards/arm/kinetis/teensy-3.x/src/teensy-3x.h
+++ b/boards/arm/kinetis/teensy-3.x/src/teensy-3x.h
@@ -55,16 +55,6 @@
 
 #define GPIO_LED          (GPIO_HIGHDRIVE | GPIO_OUTPUT_ZERO | PIN_PORTC | PIN5)
 
-/****************************************************************************
- * Public Types
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-FAR struct i2c_master_s *i2c_dev;
-
 #ifndef __ASSEMBLY__
 
 /****************************************************************************