diff --git a/rx/rx.joinpatterns.d.ts b/rx/rx.joinpatterns.d.ts
index 929c66a6f..ce251a2db 100644
--- a/rx/rx.joinpatterns.d.ts
+++ b/rx/rx.joinpatterns.d.ts
@@ -9,45 +9,45 @@ declare module Rx {
 
 	interface Pattern1<T1> {
 		and<T2>(other: Observable<T2>): Pattern2<T1, T2>;
-		then<TR>(selector: (item1: T1) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1) => TR): Plan<TR>;
 	}
 	interface Pattern2<T1, T2> {
 		and<T3>(other: Observable<T3>): Pattern3<T1, T2, T3>;
-		then<TR>(selector: (item1: T1, item2: T2) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2) => TR): Plan<TR>;
 	}
 	interface Pattern3<T1, T2, T3> {
 		and<T4>(other: Observable<T4>): Pattern4<T1, T2, T3, T4>;
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3) => TR): Plan<TR>;
 	}
 	interface Pattern4<T1, T2, T3, T4> {
 		and<T5>(other: Observable<T5>): Pattern5<T1, T2, T3, T4, T5>;
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4) => TR): Plan<TR>;
 	}
 	interface Pattern5<T1, T2, T3, T4, T5> {
 		and<T6>(other: Observable<T6>): Pattern6<T1, T2, T3, T4, T5, T6>;
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5) => TR): Plan<TR>;
 	}
 	interface Pattern6<T1, T2, T3, T4, T5, T6> {
 		and<T7>(other: Observable<T7>): Pattern7<T1, T2, T3, T4, T5, T6, T7>;
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6) => TR): Plan<TR>;
 	}
 	interface Pattern7<T1, T2, T3, T4, T5, T6, T7> {
 		and<T8>(other: Observable<T8>): Pattern8<T1, T2, T3, T4, T5, T6, T7, T8>;
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6, item7: T7) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6, item7: T7) => TR): Plan<TR>;
 	}
 	interface Pattern8<T1, T2, T3, T4, T5, T6, T7, T8> {
 		and<T9>(other: Observable<T9>): Pattern9<T1, T2, T3, T4, T5, T6, T7, T8, T9>;
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6, item7: T7, item8: T8) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6, item7: T7, item8: T8) => TR): Plan<TR>;
 	}
 	interface Pattern9<T1, T2, T3, T4, T5, T6, T7, T8, T9> {
-		then<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6, item7: T7, item8: T8, item9: T9) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T1, item2: T2, item3: T3, item4: T4, item5: T5, item6: T6, item7: T7, item8: T8, item9: T9) => TR): Plan<TR>;
 	}
 
 	interface Plan<T> { }
 
 	interface Observable<T> {
 		and<T2>(other: Observable<T2>): Pattern2<T, T2>;
-		then<TR>(selector: (item1: T) => TR): Plan<TR>;
+		thenDo<TR>(selector: (item1: T) => TR): Plan<TR>;
 	}
 
 	interface ObservableStatic {