diff --git a/src/Sound.cpp b/src/Sound.cpp
index b5c3135b..f099795a 100644
--- a/src/Sound.cpp
+++ b/src/Sound.cpp
@@ -30,6 +30,28 @@
 #include "dmg/gb_apu/Gb_Apu.h"
 #include "dmg/gb_apu/Multi_Buffer.h"
 
+#define NR10 0x60
+#define NR11 0x62
+#define NR12 0x63
+#define NR13 0x64
+#define NR14 0x65
+#define NR21 0x68
+#define NR22 0x69
+#define NR23 0x6c
+#define NR24 0x6d
+#define NR30 0x70
+#define NR31 0x72
+#define NR32 0x73
+#define NR33 0x74
+#define NR34 0x75
+#define NR41 0x78
+#define NR42 0x79
+#define NR43 0x7c
+#define NR44 0x7d
+#define NR50 0x80
+#define NR51 0x81
+#define NR52 0x84
+
 extern bool stopState;      // TODO: silence sound when true
 
 int soundQuality       = 2;
diff --git a/src/Sound.h b/src/Sound.h
index 7f50e9be..8ba49bc1 100644
--- a/src/Sound.h
+++ b/src/Sound.h
@@ -23,27 +23,6 @@
 
 #include "System.h"
 
-#define NR10 0x60
-#define NR11 0x62
-#define NR12 0x63
-#define NR13 0x64
-#define NR14 0x65
-#define NR21 0x68
-#define NR22 0x69
-#define NR23 0x6c
-#define NR24 0x6d
-#define NR30 0x70
-#define NR31 0x72
-#define NR32 0x73
-#define NR33 0x74
-#define NR34 0x75
-#define NR41 0x78
-#define NR42 0x79
-#define NR43 0x7c
-#define NR44 0x7d
-#define NR50 0x80
-#define NR51 0x81
-#define NR52 0x84
 #define SGCNT0_H 0x82
 #define FIFOA_L 0xa0
 #define FIFOA_H 0xa2