python
diff --git a/‎ast27/Include/asdl.h
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+2Lines changed: 2 additions & 0 deletions b/‎ast27/Include/asdl.h
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diff --git a/‎ast3/Python/ast.c
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+3Lines changed: 3 additions & 0 deletions b/‎ast3/Python/ast.c
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@@ -8,8 +8,10 @@ typedef PyObject * string;
 typedef PyObject * object;
 
 #ifndef __cplusplus
+#ifndef __bool_true_false_are_defined
 typedef enum {false, true} bool;
 #endif
+#endif
 
 /* It would be nice if the code generated by asdl_c.py was completely
    independent of Python, but it is a goal the requires too much work
 
@@ -13,9 +13,12 @@
 #include <assert.h>
 
 // VS 2010 doesn't have <stdbool.h>...
+#ifndef __bool_true_false_are_defined
 typedef int bool;
 #define false 0
 #define true 1
+#endif
+
 
 #if PY_MINOR_VERSION < 6
 static PyObject *