--- apr_dbd_pgsql.c.old		 2008-05-30 22:45:51.000000000 +0200
+++ apr_dbd_pgsql.c		 2008-10-15 12:38:30.000000000 +0200
@@ -218,7 +218,12 @@
 
 static const char *dbd_pgsql_get_name(const apr_dbd_results_t *res, int n)
 {
-    return (res->res ? PQfname(res->res, n) : NULL);
+  if (res->res) {
+    if ((n>=0) && (PQnfields(res->res) > n)) {
+      return PQfname(res->res,n);
+    }
+  }
+  return NULL;
 }
 
 static int dbd_pgsql_get_row(apr_pool_t *pool, apr_dbd_results_t *res,