diff --git a/CHANGES b/CHANGES
index fe8365057..7ca402699 100644
--- a/CHANGES
+++ b/CHANGES
@@ -20,6 +20,7 @@ Emulation fixes:
  - GB Video: Fix state after skipping BIOS (fixes mgba.io/i/1715 and mgba.io/i/1716)
  - GBA: Fix timing advancing too quickly in rare cases
  - GBA Audio: Fix deserializing SOUNDCNT_L
+ - GBA Audio: Fix stereo in XQ audio
  - GBA BIOS: Implement dummy sound driver calls
  - GBA BIOS: Improve HLE BIOS timing
  - GBA BIOS: Fix reloading video registers after reset (fixes mgba.io/i/1808)
diff --git a/src/gba/extra/audio-mixer.c b/src/gba/extra/audio-mixer.c
index 85941536e..db1448b86 100644
--- a/src/gba/extra/audio-mixer.c
+++ b/src/gba/extra/audio-mixer.c
@@ -291,7 +291,7 @@ void _mp2kStep(struct GBAAudioMixer* mixer) {
 		}
 		if (mixer->p->externalMixing) {
 			blip_add_delta(mixer->p->psg.left, mixer->p->clock + i * interval, sample.left - mixer->last.left);
-			blip_add_delta(mixer->p->psg.right, mixer->p->clock + i * interval, sample.left - mixer->last.left);
+			blip_add_delta(mixer->p->psg.right, mixer->p->clock + i * interval, sample.right - mixer->last.right);
 		}
 		mixer->last = sample;
 	}