diff --git a/mcufriend_shield.h b/mcufriend_shield.h
index da3b3f6..935d7a6 100644
--- a/mcufriend_shield.h
+++ b/mcufriend_shield.h
@@ -310,7 +310,9 @@ void write_8(uint8_t x)
 #define RD_STROBE RD_IDLE, RD_ACTIVE, RD_ACTIVE, RD_ACTIVE      //PWLR=TRDL=150ns, tDDR=100ns
 
 #if defined(TEENSYDUINO)
-#define CTL_INIT()   { for (int i = 2; i <= A4; i++) pinMode(i, OUTPUT); \
+#define CTL_INIT()   { \
+                       for (int i = 2; i <= 9; i++) pinMode(i, OUTPUT); \
+                       for (int i = A0; i <= A4; i++) pinMode(i, OUTPUT); \
                        RD_OUTPUT; WR_OUTPUT; CD_OUTPUT; CS_OUTPUT; RESET_OUTPUT; }
 #else
 #define CTL_INIT()   { RD_OUTPUT; WR_OUTPUT; CD_OUTPUT; CS_OUTPUT; RESET_OUTPUT; }