diff --git a/src/DriverMED/Makefile.am b/src/DriverMED/Makefile.am
index 9d0277156..7a20cbd93 100644
--- a/src/DriverMED/Makefile.am
+++ b/src/DriverMED/Makefile.am
@@ -63,7 +63,8 @@ libMeshDriverMED_la_CPPFLAGS = \
 libMeshDriverMED_la_LDFLAGS  = \
 	$(BOOST_LIBS) \
 	../Driver/libMeshDriver.la \
-	$(MED_LDFLAGS) -lMEDWrapper -lMEDWrapperBase -lMEDWrapper_V2_2 -lMEDWrapper_V2_1
+	$(MED_LDFLAGS) -lMEDWrapper -lMEDWrapperBase -lMEDWrapper_V2_2 -lMEDWrapper_V2_1 \
+	$(BOOST_LIB_SYSTEM) 
 
 
 MED_Test_CPPFLAGS = \
@@ -82,5 +83,6 @@ MED_Test_LDADD = \
 	-lMEDWrapper \
 	-lMEDWrapperBase \
 	-lMEDWrapper_V2_2 \
-	-lMEDWrapper_V2_1 
+	-lMEDWrapper_V2_1 \	
+	$(BOOST_LIB_SYSTEM) 
 
diff --git a/src/SMESH/Makefile.am b/src/SMESH/Makefile.am
index 72cc31ce1..340862396 100644
--- a/src/SMESH/Makefile.am
+++ b/src/SMESH/Makefile.am
@@ -95,5 +95,6 @@ libSMESHimpl_la_LDFLAGS = \
 	$(DriverCGNS_LIB) \
 	../SMESHUtils/libSMESHUtils.la \
 	$(BOOST_LIB_THREAD)  \
+	$(BOOST_LIB_SYSTEM)  \
 	$(GEOM_LDFLAGS) -lNMTTools \
 	$(CAS_LDPATH) -lTKShHealing -lTKPrim -lTKG2d -lTKCDF