diff --git a/configure.in b/configure.in
index 5180980fc..ff8583216 100755
--- a/configure.in
+++ b/configure.in
@@ -292,6 +292,15 @@ fi
 AC_SUBST(DO_RANLIB)
 AC_SUBST(RANLIB)
 
+#----------- DEPENDS --------------------
+
+if test "x${CXX_DEPENDS}" = "x"; then
+CXX_DEPENDS='g++ -MM'
+fi
+AC_SUBST(CXX_DEPENDS)
+
+#----------------------------------------
+
 #----------------------------------------