diff --git a/src/dynafunc.asm b/src/dynafunc_amd64_gnu.asm
similarity index 100%
rename from src/dynafunc.asm
rename to src/dynafunc_amd64_gnu.asm
diff --git a/src/wren/dynafunc_maker.cpp b/src/wren/dynafunc_maker.cpp
index f2040c3..9c7f0b0 100644
--- a/src/wren/dynafunc_maker.cpp
+++ b/src/wren/dynafunc_maker.cpp
@@ -15,6 +15,7 @@
 namespace wren {
 	namespace {
 #if defined(__amd64__) and defined(__gnu_linux__)
+		//see src/dynafunc_amd64_gnu.asm
 		const constexpr unsigned char g_dynafunc[] = {
 			0x48, 0xbf, 0xef, 0xbe, 0xad, 0xde, 0xef, 0xbe, 0xad, 0xde, 0x48, 0xba,
 			0x0d, 0xf0, 0xdd, 0xe0, 0xfe, 0x0f, 0xdc, 0xba, 0xff, 0xe2, 0xc3