diff --git a/pinouts.d/btt-skr-mini-e3-v3.0.cfg b/pinouts.d/btt-skr-mini-e3-v3.0.cfg
index b0b8430..eb57184 100644
--- a/pinouts.d/btt-skr-mini-e3-v3.0.cfg
+++ b/pinouts.d/btt-skr-mini-e3-v3.0.cfg
@@ -46,4 +46,7 @@ aliases:
 
     # EXP1 header
     EXP1_1=PB5,  EXP1_3=PA9,   EXP1_5=PA10, EXP1_7=PB8,  EXP1_9=<GND>,
-    EXP1_2=PA15, EXP1_4=<RST>, EXP1_6=PB9,  EXP1_8=PD6, EXP1_10=<5V>
+    EXP1_2=PA15, EXP1_4=<RST>, EXP1_6=PB9,  EXP1_8=PD6, EXP1_10=<5V>,
+
+    # I/O Header
+    IO_1=PD5, IO_2=PD4, IO_3=PD3, IO_4=PD2,IO_5=PD0