diff --git a/src/util/regex/regex-matcher.hpp b/src/util/regex/regex-matcher.hpp
index baa8bf3..0d34311 100644
--- a/src/util/regex/regex-matcher.hpp
+++ b/src/util/regex/regex-matcher.hpp
@@ -66,7 +66,7 @@
 
 private:
   bool 
-  recursiveMatch(const int& mId, const Name& name, const int& offset, const int& len);
+  recursiveMatch(size_t mId, const Name& name, size_t offset, size_t len);
 
 
 protected:
@@ -124,7 +124,7 @@
 }
   
 inline bool 
-RegexMatcher::recursiveMatch(const int& mId, const Name& name, const int& offset, const int& len)
+RegexMatcher::recursiveMatch(size_t mId, const Name& name, size_t offset, size_t len)
 {
   // _LOG_TRACE ("Enter RegexMatcher::recursiveMatch");