diff --git a/sw/ground_segment/cockpit/Makefile b/sw/ground_segment/cockpit/Makefile
index f6002fdf5c..6d38c2e30e 100644
--- a/sw/ground_segment/cockpit/Makefile
+++ b/sw/ground_segment/cockpit/Makefile
@@ -23,8 +23,8 @@
 # Quiet compilation
 Q=@
 
-OCAMLC=ocamlc -thread
-OCAMLOPT=ocamlopt -thread
+OCAMLC=ocamlc -thread -I +xml-light
+OCAMLOPT=ocamlopt -thread -I +xml-light
 INCLUDES=-I +lablgtk2 -I ../../lib/ocaml
 LIBS=glibivy-ocaml.cma lablgtk.cma lib-pprz.cma lablgnomecanvas.cma xlib-pprz.cma
 CMXA=$(LIBS:.cma=.cmxa)
diff --git a/sw/ground_segment/tmtc/Makefile b/sw/ground_segment/tmtc/Makefile
index 10c41b1800..21c0d52999 100644
--- a/sw/ground_segment/tmtc/Makefile
+++ b/sw/ground_segment/tmtc/Makefile
@@ -35,7 +35,7 @@ clean:
 OCAMLC = ocamlc
 OCAMLOPT = ocamlopt
 OCAMLLIB = ../../lib/ocaml
-INCLUDES= -I $(OCAMLLIB) -I ../multimon -I +lablgtk2
+INCLUDES= -I $(OCAMLLIB) -I ../multimon -I +lablgtk2 -I +xml-light
 LIBPPRZCMA=$(OCAMLLIB)/lib-pprz.cma
 
 $(VAR)/boa.conf :$(CONF)/boa.conf
diff --git a/sw/ground_segment/visu3d/Makefile b/sw/ground_segment/visu3d/Makefile
index 2ee0d537c4..4bf6b5a338 100644
--- a/sw/ground_segment/visu3d/Makefile
+++ b/sw/ground_segment/visu3d/Makefile
@@ -1,5 +1,5 @@
 OCAMLOPT0 = ocamlopt
-OCAMLC    = ocamlc
+OCAMLC    = ocamlc -I +xml-light
 
 MLFLAGS   = -I +lablgtk2 -I +lablGL -I +camlimages -I ../../lib/ocaml
 
diff --git a/sw/ground_segment/wind/Makefile b/sw/ground_segment/wind/Makefile
index 8882401f33..d8c3cdf3a8 100644
--- a/sw/ground_segment/wind/Makefile
+++ b/sw/ground_segment/wind/Makefile
@@ -24,7 +24,7 @@ include ../../../conf/Makefile.local
 
 all: wind
 
-INCLUDES= -I ../../lib/ocaml -I +lablgtk2
+INCLUDES= -I ../../lib/ocaml -I +lablgtk2 -I +xml-light
 
 OCAMLC= ocamlc $(INCLUDES)
 OCAMLMLI= ocamlc $(INCLUDES)
diff --git a/sw/lib/ocaml/Makefile b/sw/lib/ocaml/Makefile
index 7d63f97c8e..9902b90c7c 100644
--- a/sw/lib/ocaml/Makefile
+++ b/sw/lib/ocaml/Makefile
@@ -22,8 +22,8 @@
 
 Q=@
 
-INCLUDES=
-XINCLUDES= -I +lablgl -I +lablgtk2
+INCLUDES= -I +xml-light
+XINCLUDES= -I +lablgl -I +lablgtk2 -I +xml-light
 OCAMLC=ocamlc $(INCLUDES)
 OCAMLOPT=ocamlopt $(INCLUDES)
 
@@ -44,7 +44,7 @@ opt : all lib-pprz.cmxa xlib-pprz.cmxa
 
 lib-pprz.cma : $(CMO)
 	@echo OL $@
-	$(Q)ocamlmklib -o lib-pprz str.cma unix.cma xml-light.cma $^
+	$(Q)ocamlmklib -I +xml-light -o lib-pprz str.cma unix.cma xml-light.cma $^
 
 lib-pprz.cmxa : $(CMX)
 	@echo OOL $@
@@ -52,11 +52,11 @@ lib-pprz.cmxa : $(CMX)
 
 xlib-pprz.cma : $(XCMO)
 	@echo OL $@
-	$(Q)ocamlmklib -o xlib-pprz $^
+	$(Q)ocamlmklib -I +xml-light -o xlib-pprz $^
 
 xlib-pprz.cmxa : $(XCMX)
 	@echo OOL $@
-	$(Q)ocamlmklib -o xlib-pprz $^
+	$(Q)ocamlmklib -I +xml-light -o xlib-pprz $^
 
 xml_get.out : lib-pprz.cma xml_get.cmo
 	@echo OL $@
diff --git a/sw/logalizer/Makefile b/sw/logalizer/Makefile
index 6667194bab..4774d3a917 100644
--- a/sw/logalizer/Makefile
+++ b/sw/logalizer/Makefile
@@ -20,7 +20,7 @@
 # Boston, MA 02111-1307, USA.  
 # 
 
-OCAMLC = ocamlc
+OCAMLC = ocamlc -I +xml-light
 OCAMLOPT = ocamlopt
 
 all: play
@@ -32,4 +32,4 @@ play : play.ml
 	$(OCAMLC) -custom -o $@ unix.cma glibivy-ocaml.cma -I +lablgtk2 -I ../lib/ocaml lablgtk.cma lib-pprz.cma gtkInit.cmo  $^
 
 plot_adc : plot_adc.c
-	gcc -Wall `pkg-config gtk+-2.0 --cflags` -o plot_adc plot_adc.c `pkg-config gtk+-2.0 --libs` -lgtkdatabox -lglibivy -lpcre
\ No newline at end of file
+	gcc -Wall `pkg-config gtk+-2.0 --cflags` -o plot_adc plot_adc.c `pkg-config gtk+-2.0 --libs` -lgtkdatabox -lglibivy -lpcre
diff --git a/sw/simulator/Makefile b/sw/simulator/Makefile
index 286ea03631..044a0b2204 100644
--- a/sw/simulator/Makefile
+++ b/sw/simulator/Makefile
@@ -32,8 +32,8 @@ SIMSCMO=$(SIMSML:%.ml=%.cmo)
 SIMSCMX=$(SIMSML:%.ml=%.cmx)
 
 
-OCAMLC = ocamlc
-OCAMLOPT=ocamlopt -p
+OCAMLC = ocamlc -I +xml-light
+OCAMLOPT=ocamlopt -I +xml-light -p
 INCLUDES= -I +lablgtk2 -I ../lib/ocaml
 
 AIRBORNE = ../airborne
diff --git a/sw/tools/Makefile b/sw/tools/Makefile
index a420e7ac7d..4e444ea616 100644
--- a/sw/tools/Makefile
+++ b/sw/tools/Makefile
@@ -23,7 +23,7 @@
 Q=@
 
 OCAML=ocaml
-OCAMLC=ocamlc -I ../lib/ocaml
+OCAMLC=ocamlc -I ../lib/ocaml -I +xml-light
 OCAMLLEX=ocamllex
 OCAMLYACC=ocamlyacc