diff --git a/CHANGES b/CHANGES
index c3b8ba056..0ead4fb8b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,4 +1,6 @@
 0.9.4: (Future)
+Emulation fixes:
+ - GBA I/O: Disable open bus behavior on invalid register 06A
 Other fixes:
  - FFmpeg: Fix crash when encoding audio with some containers
 
diff --git a/src/gba/io.c b/src/gba/io.c
index 7abf28047..6b493413b 100644
--- a/src/gba/io.c
+++ b/src/gba/io.c
@@ -920,6 +920,7 @@ uint16_t GBAIORead(struct GBA* gba, uint32_t address) {
 		// Handled transparently by registers
 		break;
 	case 0x066:
+	case 0x06A:
 	case 0x06E:
 	case 0x076:
 	case 0x07A: