diff --git a/src/interfaces/jdbc/org/postgresql/jdbc1/ResultSet.java b/src/interfaces/jdbc/org/postgresql/jdbc1/ResultSet.java
index 6c93c7a27646198a3f3d6e5d08ca347b051cc6b2..aae8cf6ff26bd183d0542f9b6a301757ce5ad9b9 100644
--- a/src/interfaces/jdbc/org/postgresql/jdbc1/ResultSet.java
+++ b/src/interfaces/jdbc/org/postgresql/jdbc1/ResultSet.java
@@ -190,7 +190,7 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
     if (s != null)
       {
 	int c = s.charAt(0);
-	return ((c == 't') || (c == 'T'));
+	return ((c == 't') || (c == 'T') || (c == '1'));
       }
     return false;		// SQL NULL
   }
diff --git a/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java b/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java
index 561614b33abec0704e22d6a4efa80659e62a05e0..54865d8e3f7e36259e638f2bfbde9c6c1ece0192 100644
--- a/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java
+++ b/src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java
@@ -198,7 +198,7 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
     if (s != null)
       {
 	int c = s.charAt(0);
-	return ((c == 't') || (c == 'T'));
+	return ((c == 't') || (c == 'T') || (c == '1'));
       }
     return false;		// SQL NULL
   }