diff --git a/Cart_Reader/NES.ino b/Cart_Reader/NES.ino
index bd1a0fca..9d3b170a 100644
--- a/Cart_Reader/NES.ino
+++ b/Cart_Reader/NES.ino
@@ -830,6 +830,7 @@ static void set_romsel(unsigned int address) {
 static unsigned char read_prg_byte(unsigned int address) {
   MODE_READ;
   PRG_READ;
+  ROMSEL_HI;
   set_address(address);
   PHI2_HI;
   set_romsel(address);