diff --git a/v2.3/toolkit/pyext/Makefile.am b/v2.3/toolkit/pyext/Makefile.am
index 92cd0a522d5bf46ecaabf84e95551e6ed0fd288e..c5de0bd90075e85a2500ababf6fc4977b49837e5 100644
--- a/v2.3/toolkit/pyext/Makefile.am
+++ b/v2.3/toolkit/pyext/Makefile.am
@@ -23,7 +23,7 @@ _fastnlo_la_LIBADD = $(top_srcdir)/fastnlotoolkit/libfastnlotoolkit.la
 
 include ./$(DEPDIR)/fastnlo_wrap.Plo
 
-#$(DEPDIR)/fastnlo_wrap.Plo: fastnlo_wrap.cc
+$(DEPDIR)/fastnlo_wrap.Plo: fastnlo_wrap.cc
 
 fastnlo_wrap.cc: fastnlo.i
 	$(SWIG) -c++ -python -I$(top_srcdir)/fastnlotoolkit/include/fastnlotk -o $@ -MD -MF $(DEPDIR)/fastnlo_wrap.Plo $<