diff --git a/src/libCom/misc/locationException.h b/src/libCom/misc/locationException.h
index ddcdb5ce1..72a343ba5 100644
--- a/src/libCom/misc/locationException.h
+++ b/src/libCom/misc/locationException.h
@@ -43,7 +43,7 @@ inline const char * sourceFileLocation<T>::fileName () const
 #define throwWithLocation(parm) throwExceptionWithLocation (parm, __FILE__, __LINE__);
 
 template <class T>
-inline void throwExceptionWithLocation (T &parm, const char *pFileName, unsigned lineNo)
+inline void throwExceptionWithLocation (const T &parm, const char *pFileName, unsigned lineNo)
 {
 #   ifdef noExceptionsFromCXX
         fprintf (stderr, "C++ exception in file=%s at line=%u, and no compiler support - cant proceed.\n",