Index: pdb.c
===================================================================
RCS file: /cvsroot/amber11/src/antechamber/pdb.c,v
retrieving revision 10.0
diff -u -r10.0 pdb.c
--- pdb.c	15 Apr 2008 23:19:47 -0000	10.0
+++ pdb.c	10 Nov 2008 16:55:55 -0000
@@ -58,7 +58,11 @@
 			id = -1;
 			if (overflow_flag == 0) {
 				line[26] = ' ';
-				sscanf(&line[5], "%d", &id);
+            if (strchr("0123456789", line[5]) != NULL) {
+				    sscanf(&line[5], "%d", &id); /* ATOM */
+            } else {
+				    sscanf(&line[6], "%d", &id); /* HETATM */
+            }
 				if (pqr)
 					sscanf(&line[22], "%d%lf%lf%lf%lf%lf%s", &tmpint2, &x,
 						   &y, &z, &tmpfloat1, &tmpfloat2, tmpchar);