diff --git a/decompyle/marshal_20.c b/decompyle/marshal_20.c
--- a/decompyle/marshal_20.c
+++ b/decompyle/marshal_20.c
@@ -8,7 +8,7 @@
 #include "Python.h"
 #include "longintrepr.h"
 #include "compile.h"
-#include "marshal.h"
+#include "marshal_23.h"
 
 /* High water mark to determine when the marshalled object is dangerously deep
  * and risks coring the interpreter.  When the object stack gets this deep,
diff --git a/decompyle/marshal_22.c b/decompyle/marshal_22.c
index 220dbd1..64c1245 100644
--- a/decompyle/marshal_22.c
+++ b/decompyle/marshal_22.c
@@ -8,7 +8,7 @@
 #include "Python.h"
 #include "longintrepr.h"
 #include "compile.h"
-#include "marshal.h"
+#include "marshal_23.h"
 
 /* High water mark to determine when the marshalled object is dangerously deep
  * and risks coring the interpreter.  When the object stack gets this deep,
diff --git a/decompyle/marshal_23.c b/decompyle/marshal_23.c
index d221a85..e950173 100644
--- a/decompyle/marshal_23.c
+++ b/decompyle/marshal_23.c
@@ -7,7 +7,7 @@
 #include "Python.h"
 #include "longintrepr.h"
 #include "compile.h"
-#include "marshal.h"
+#include "marshal_23.h"
 
 /* High water mark to determine when the marshalled object is dangerously deep
  * and risks coring the interpreter.  When the object stack gets this deep,
diff --git a/decompyle/marshal_23.h b/decompyle/marshal_23.h
new file mode 100644
index 0000000..f123093
--- /dev/null
+++ b/decompyle/marshal_23.h
@@ -0,0 +1,23 @@
+
+/* Interface for marshal.c */
+
+#ifndef Py_MARSHAL_H
+#define Py_MARSHAL_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+PyAPI_FUNC(void) PyMarshal_WriteLongToFile(long, FILE *);
+PyAPI_FUNC(void) PyMarshal_WriteObjectToFile(PyObject *, FILE *);
+PyAPI_FUNC(PyObject *) PyMarshal_WriteObjectToString(PyObject *);
+
+PyAPI_FUNC(long) PyMarshal_ReadLongFromFile(FILE *);
+PyAPI_FUNC(int) PyMarshal_ReadShortFromFile(FILE *);
+PyAPI_FUNC(PyObject *) PyMarshal_ReadObjectFromFile(FILE *);
+PyAPI_FUNC(PyObject *) PyMarshal_ReadLastObjectFromFile(FILE *);
+PyAPI_FUNC(PyObject *) PyMarshal_ReadObjectFromString(char *, int);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_MARSHAL_H */