diff --git a/Makefile.dev b/Makefile.dev
index f262d913043f9d940b4678abe3033509dc98014b..68cfdc33d54f022492993e13abd7fd80307db85a 100644
--- a/Makefile.dev
+++ b/Makefile.dev
@@ -58,8 +58,10 @@ update_version:
 	git add src/lv6version.ml
 	make clean && make
 
+BRANCH=$(shell git rev-parse --abbrev-ref HEAD)
+
 cia:
-	test -f committed && \
+	test -f committed &&  \
    echo "*** I won't commit!\n*** until you 'make update_version'!" \
       || (git commit -a -F log && touch committed) && echo "Hint: 'make ci' to test the CI before doing 'make 'push'"
 
@@ -99,7 +101,7 @@ $(WWWTEST)/pool/$(PACKNAME).tgz: $(PACKNAME).tgz
 
 
 opam : $(WWW)/pool/$(PACKNAME).tgz
-	test -f committed && ( \
+	[ $(BRANCH) = "master" ] && test -f committed && ( \
      cd $(WWW)/opam-repository/packages && \
 	  oasis2opam   $(HTTP)/pool/$(PACKNAME).tgz && \
 	  cp ~/lus2lic/opam $(OPAM_FILE) && \
@@ -109,7 +111,7 @@ opam : $(WWW)/pool/$(PACKNAME).tgz
 	cp -rf $(OPAM_DIR) $(OFFICIAL_OPAM_DIR)
 
 opam-test : $(WWWTEST)/pool/$(PACKNAME).tgz
-	cd $(WWWTEST)/opam-repository/packages && \
+	[ $(BRANCH) = "master" ] && cd $(WWWTEST)/opam-repository/packages && \
 	oasis2opam  $(HTTPTEST)/pool/$(PACKNAME).tgz && \
 	cp ~/lus2lic/opam $(OPAM_FILE_TEST) && \
 	cd .. ; opam-admin check  && opam-admin make -g
diff --git a/src/l2lExpandMetaOp.ml b/src/l2lExpandMetaOp.ml
index 270b5d61b133410ab6d80909a10c7d6f50db1329..279fbdcd8dda7c097f599d344bf5c2edc886ef79 100644
--- a/src/l2lExpandMetaOp.ml
+++ b/src/l2lExpandMetaOp.ml
@@ -1,4 +1,4 @@
-(** Time-stamp: <modified the 20/02/2017 (at 11:30) by Erwan Jahier> *)
+(** Time-stamp: <modified the 04/07/2018 (at 09:59) by Erwan Jahier> *)
 
 open Lxm
 open Lic
@@ -334,11 +334,12 @@ let (create_map_body: local_ctx -> Lic.static_arg list -> Lic.node_body * var_in
 		    let cl = 
             List.map (fun l -> snd (Lic.var_info_of_left l).var_clock_eff) lhs
           in
+          let p,n = fst iter_node.it in
           let rhs = {
             ve_typ = List.map Lic.type_of_left lhs;
             ve_clk = cl;
-            ve_core = 
-              if AstPredef.is_a_predef_op (snd(fst iter_node.it)) then
+            ve_core =
+              if p="Lustre" && AstPredef.is_a_predef_op n then
                 CallByPosLic({src=lxm;it=(Lic.PREDEF_CALL iter_node)}, xi_j)
               else
                 CallByPosLic({src=lxm;it=(CALL iter_node)}, xi_j);
diff --git a/test/should_work/iterate_on_plus.lus b/test/should_work/iterate_on_plus.lus
new file mode 100644
index 0000000000000000000000000000000000000000..621e668b152631554c9b3909a2b16ad5e75fb458
--- /dev/null
+++ b/test/should_work/iterate_on_plus.lus
@@ -0,0 +1,81 @@
+node O(x: bool) returns (y: bool);
+let
+   y = false -> pre x; -- y = 0 x
+tel
+
+node I(x: bool) returns (y: bool);
+let
+   y = true -> pre x; -- y = 1 x
+tel
+
+--node adder=plus;
+node plus(x,y: bool) returns (s: bool);
+var c: bool;
+let
+   c = O(if c then (x or y) else (x and y));
+   s = c xor x xor y;
+tel
+
+
+node tabtimes<<const n: int; const dummy: bool>> (
+	xin, yin : bool
+) returns (
+	z : bool
+);
+var
+	------------------
+	-- time :
+	-- T[i]_i = 1 T[i]_j = 0 
+	T : bool^n;
+	------------------
+	-- x bits:
+	-- XB[i]_t = x_i if t >= i
+	--         = 0 else
+	------------------
+	XB : bool^n;
+	------------------
+	-- y window:
+	-- WY[i]_t = y_(t-i) si t >= i
+	--         = 0 sinon
+	WY : bool^n;
+	------------------
+	-- Sum arguments:
+	-- A[i]_t = if XB[i]_t then
+	-- WY[i]_t else false
+	A : bool^n;
+	------------------
+	-- Sum accumulator:
+	------------------
+	S : bool^n;
+	--APRES n ticks :
+	timeout : bool;
+	
+	x, y : bool;
+let
+	--input filtering:
+	--enforce 0 after timeout
+	x = xin and not timeout;
+	y = yin and not timeout;
+
+	T[0] = true -> false;
+	T[1..n-1] = false^(n-1) -> pre T[0..n-2];
+	timeout = (false -> pre timeout) or T[n-1];
+
+	--XB = if T then x^n else (false^n -> pre XB);
+	XB = map<<Lustre::if,n>>(T, x^n, map<<O,n>>(XB));
+
+	WY[0] = y;
+	WY[1..n-1] = false^(n-1) -> pre WY[0..n-2];
+
+	A = map<<Lustre::if,n>>(XB, WY, false^n);
+
+	S[0] = A[0];
+	--S[1..n-1] = map<<adder,n-1>>(S[0..n-2], A[1..n-1]);
+	S[1..n-1] = map<<plus,n-1>>(S[0..n-2], A[1..n-1]);
+
+	z = if timeout then dummy else S[n-1];
+tel
+
+node test = tabtimes<<4,false>>;
+
+