diff --git a/src/engine/platform/sound/sid3.h b/src/engine/platform/sound/sid3.h
index d04416390..7454fd9f5 100644
--- a/src/engine/platform/sound/sid3.h
+++ b/src/engine/platform/sound/sid3.h
@@ -12,7 +12,8 @@ extern "C" {
 
 #define SID3_NUM_CHANNELS 7
 #define SID3_NUM_FILTERS 4
-#define SID3_NUM_REGISTERS 256
+#define SID3_REGISTERS_PER_CHANNEL 32
+#define SID3_NUM_REGISTERS (SID3_NUM_CHANNELS * SID3_REGISTERS_PER_CHANNEL)
 #define SID3_MAX_VOL 255
 
 #define SID3_WAVETABLE_LENGTH 256