diff --git a/src/platform/python/_builder.h b/src/platform/python/_builder.h
index ad12c107e..c39fcf143 100644
--- a/src/platform/python/_builder.h
+++ b/src/platform/python/_builder.h
@@ -22,8 +22,7 @@
 #define CXX_GUARD_END
 
 #define PYCPARSE
-#define va_list void*
-
+typedef ... va_list;
 typedef int... time_t;
 typedef int... off_t;
 typedef ...* png_structp;
diff --git a/src/platform/python/_builder.py b/src/platform/python/_builder.py
index e144b6a51..f18a3c95e 100644
--- a/src/platform/python/_builder.py
+++ b/src/platform/python/_builder.py
@@ -52,7 +52,7 @@ ffi.set_source("mgba._pylib", """
      libraries=["mgba"],
      library_dirs=[bindir],
      runtime_library_dirs=[libdir],
-     sources=[os.path.join(pydir, path) for path in ["vfs-py.c", "core.c", "log.c", "sio.c"]])
+     sources=[os.path.join(pydir, path) for path in ["vfs-py.c", "core.c", "log.c"]])
 
 preprocessed = subprocess.check_output(cpp + ["-fno-inline", "-P"] + cppflags + [os.path.join(pydir, "_builder.h")], universal_newlines=True)