pdbcat.C | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pdbcat.C b/pdbcat.C
index 0786d9b..387edf9 100644
--- a/pdbcat.C
+++ b/pdbcat.C
@@ -17,7 +17,8 @@
 #include <stdlib.h> // for exit
 #include <stdio.h>  // for feof() and other file manip stuff
 #include <string.h> // for strcasecmp
-#include <iostream.h>
+#include <iostream>
+using namespace std;
 #include "Common.h"
 #include "PDBData.h"