diff --git a/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20XX/TARGET_TEENSY3_1/PinNames.h b/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20XX/TARGET_TEENSY3_1/PinNames.h
index a4da0f851a..bdb55e8065 100644
--- a/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20XX/TARGET_TEENSY3_1/PinNames.h
+++ b/libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20XX/TARGET_TEENSY3_1/PinNames.h
@@ -262,8 +262,8 @@ typedef enum {
     A19 = PTC11,
     A20 = PTE0,
     
-    I2C_SCL = PTB3,
-    I2C_SDA = PTB2,
+    I2C_SCL = PTB2,
+    I2C_SDA = PTB3,
     
     SPI_SCK = PTC5,  // sclk
     SPI_DOUT = PTC6, // mosi