diff --git a/config/disasm_overrides.yml b/config/disasm_overrides.yml
index 5b331fde..525ded38 100644
--- a/config/disasm_overrides.yml
+++ b/config/disasm_overrides.yml
@@ -8,6 +8,7 @@ symbol_aligns:
   0x80019380: 32
   0x80019760: 32
   0x8001a0c0: 32
+  0x80026400: 32
   0x80031d80: 32
   0x80207458: 8 # align RunQueue to 0x001251d8
   0x800b9140: 32 # align gam_win_moji1_tex to 32 bytes
diff --git a/config/dol_slices.yml b/config/dol_slices.yml
index bbf18cb8..e3d89f35 100644
--- a/config/dol_slices.yml
+++ b/config/dol_slices.yml
@@ -103,6 +103,8 @@ jaudio_NES/internal/playercall.c:
     .bss: [0x801864d0,0x80186590]
 jaudio_NES/internal/os.c:
     .text: [0x80026120, 0x80026300]
+jaudio_NES/internal/astest.c:
+    .text: [0x80026300, 0x80026400]
 jaudio_NES/internal/random.c:
     .text: [0x80031ce0, 0x80031d80]
     .sdata: [0x80217c38, 0x80217c40]
diff --git a/include/jaudio_NES/astest.h b/include/jaudio_NES/astest.h
new file mode 100644
index 00000000..14b9a212
--- /dev/null
+++ b/include/jaudio_NES/astest.h
@@ -0,0 +1,9 @@
+#ifndef ASTEST_H
+#define ASTEST_H
+
+#include "types.h"
+#include "jaudio_NES/audiostruct.h"
+
+extern void CopyStc(commonch* dstStc, commonch* srcStc);
+
+#endif
diff --git a/src/static/jaudio_NES/internal/astest.c b/src/static/jaudio_NES/internal/astest.c
new file mode 100644
index 00000000..24e78783
--- /dev/null
+++ b/src/static/jaudio_NES/internal/astest.c
@@ -0,0 +1,5 @@
+#include "jaudio_NES/astest.h"
+
+extern void CopyStc(commonch* dstStc, commonch* srcStc) {
+    *dstStc = *srcStc;
+}