1 files changed, 1 insertions, 1 deletions

diff --git a/src/sptr.h b/src/sptr.h
index d152fb4..e72644d 100644
--- a/src/sptr.h
+++ b/src/sptr.h
@@ -19,7 +19,7 @@ public:
                 decCount();
         }
 
-        SPtr( SPtr<T> &src ) :
+        SPtr( const SPtr<T> &src ) :
                 pRefCnt( src.pRefCnt ),
                 pData( src.pData )
         {