diff --git a/CHANGES b/CHANGES
index 7bd22952c..e67847a42 100644
--- a/CHANGES
+++ b/CHANGES
@@ -8,6 +8,7 @@ Bugfixes:
  - GBA: Deinit savegame when unloading a ROM
  - GBA: Fix BIOS check on big endian
  - Libretro: Fix a memory leak with the render buffer
+ - GBA Audio: Fix 8-bit writes to audio channel 3 and 4 registers
 Misc:
  - Qt: Remove useless help icons in dialogs
  - GBA: Attempting to save a screenshot-style savestate should be allowed without libpng
diff --git a/src/gba/io.c b/src/gba/io.c
index 304a6253a..63d514a70 100644
--- a/src/gba/io.c
+++ b/src/gba/io.c
@@ -328,7 +328,7 @@ void GBAIOWrite(struct GBA* gba, uint32_t address, uint16_t value) {
 			break;
 		case REG_SOUND3CNT_HI:
 			GBAAudioWriteSOUND3CNT_HI(&gba->audio, value);
-			value &= 0xE000;
+			value &= 0xE03F;
 			break;
 		case REG_SOUND3CNT_X:
 			GBAAudioWriteSOUND3CNT_X(&gba->audio, value);
@@ -337,7 +337,7 @@ void GBAIOWrite(struct GBA* gba, uint32_t address, uint16_t value) {
 			break;
 		case REG_SOUND4CNT_LO:
 			GBAAudioWriteSOUND4CNT_LO(&gba->audio, value);
-			value &= 0xFF00;
+			value &= 0xFF3F;
 			break;
 		case REG_SOUND4CNT_HI:
 			GBAAudioWriteSOUND4CNT_HI(&gba->audio, value);