diff --git a/firmware/glasgow.h b/firmware/glasgow.h
index 407bb761c..e8673332c 100644
--- a/firmware/glasgow.h
+++ b/firmware/glasgow.h
@@ -50,8 +50,8 @@ enum {
 #define PIND_OEQ_N_REVAB      7
 
 #define CONCAT(a, b) a ## b
-#define IO_A(number) CONCAT(PD, number)
-#define IO_B(number) CONCAT(PD, number)
+#define IO_A(number) CONCAT(PA, number)
+#define IO_B(number) CONCAT(PB, number)
 #define IO_D(number) CONCAT(PD, number)
 
 #define IO_ALERT_N        IO_A(PINA_ALERT_N)