diff --git a/pgsql/Pgsql_Row.h b/pgsql/Pgsql_Row.h
index 9beaf51..de0d4ef 100644
--- a/pgsql/Pgsql_Row.h
+++ b/pgsql/Pgsql_Row.h
@@ -34,12 +34,12 @@ namespace Pgsql {
 				return *this;
 			}
 
-			bool operator==(const const_iterator &rhs)
+            bool operator==(const const_iterator &rhs) const
 			{
 				return m_row == rhs.m_row && m_col == rhs.m_col;
 			}
 
-			bool operator!=(const const_iterator &rhs)
+            bool operator!=(const const_iterator &rhs) const
 			{
 				return !operator==(rhs);
 			}