diff --git a/qmdoc.h b/qmdoc.h
new file mode 100644
index 0000000..78730e7
--- /dev/null
+++ b/qmdoc.h
@@ -0,0 +1,15 @@
+#ifndef QMDOC_H
+#define QMDOC_H
+
+enum {
+    ERR_NONE        =  0,
+    ERR_USAGE       = -1,
+    ERR_IO          = -5,
+    ERR_PARSER      = -6,
+    ERR_MEM         = -7,
+    ERR_NOTSUPP     = -8,
+    ERR_INVALID     = -9,
+    ERR_MISC        = -88,
+};
+
+#endif /* QMDOC_H */