diff --git a/Documentation/perf_counter/levenshtein.h b/Documentation/perf_counter/levenshtein.h
new file mode 100644
index 0000000..0173abe
--- /dev/null
+++ b/Documentation/perf_counter/levenshtein.h
@@ -0,0 +1,8 @@
+#ifndef LEVENSHTEIN_H
+#define LEVENSHTEIN_H
+
+int levenshtein(const char *string1, const char *string2,
+	int swap_penalty, int substition_penalty,
+	int insertion_penalty, int deletion_penalty);
+
+#endif