diff --git a/Include/errors.h b/Include/errors.h
index c8fc63b..f0e3762 100755
--- a/Include/errors.h
+++ b/Include/errors.h
@@ -17,8 +17,17 @@
 extern object *SystemError;
 extern object *KeyboardInterrupt;
 
+/* Some more planned for the future */
+
+#define IndexError		RuntimeError
+#define KeyError		RuntimeError
+#define ZeroDivisionError	RuntimeError
+#define OverflowError		RuntimeError
+
 /* Convenience functions */
 
 extern int err_badarg PROTO((void));
 extern object *err_nomem PROTO((void));
 extern object *err_errno PROTO((object *));
+
+extern void err_badcall PROTO((void));
diff --git a/Include/pyerrors.h b/Include/pyerrors.h
index c8fc63b..f0e3762 100644
--- a/Include/pyerrors.h
+++ b/Include/pyerrors.h
@@ -17,8 +17,17 @@
 extern object *SystemError;
 extern object *KeyboardInterrupt;
 
+/* Some more planned for the future */
+
+#define IndexError		RuntimeError
+#define KeyError		RuntimeError
+#define ZeroDivisionError	RuntimeError
+#define OverflowError		RuntimeError
+
 /* Convenience functions */
 
 extern int err_badarg PROTO((void));
 extern object *err_nomem PROTO((void));
 extern object *err_errno PROTO((object *));
+
+extern void err_badcall PROTO((void));