diff --git a/src/devices/sound/k054539.cpp b/src/devices/sound/k054539.cpp
index 126141c9a9c..b7108e925f8 100644
--- a/src/devices/sound/k054539.cpp
+++ b/src/devices/sound/k054539.cpp
@@ -482,7 +482,7 @@ u8 k054539_device::read(offs_t offset)
 	case 0x22d:
 		if(regs[0x22f] & 0x10) {
 			offs_t const addr = (cur_ptr & 0x3fff) | ((cur_ptr & 0x10000) >> 2);
-			uint8_t res = (rom_addr == 0x80) ? ram[ram_addr] : read_byte((0x20000*rom_addr) + cur_ptr);
+			uint8_t res = (rom_addr == 0x80) ? ram[addr] : read_byte((0x20000*rom_addr) + cur_ptr);
 			if(!machine().side_effects_disabled())
 				cur_ptr = (cur_ptr + 1) & 0x1ffff;
 			return res;