diff --git a/Makefile.am b/Makefile.am
index 6791395..d6184dd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,3 +1,5 @@
+ACLOCAL_AMFLAGS = -I m4
+
 if ENABLE_TESTS
   MAYBE_TEST = test
 endif
diff --git a/src/Makefile.am b/src/Makefile.am
index 95f5ea1..9ad2e4b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -8,7 +8,7 @@ psftest_LDFLAGS = libpsf.la
 libpsf_la_SOURCES = psf.cc psfdata.cc psfproperty.cc psfchunk.cc \
 	psfcontainer.cc psfindexedcontainer.cc psfgroup.cc psffile.cc \
 	psftype.cc psfstruct.cc psfsections.cc psftrace.cc \
-	psfnonsweepvalue.cc psfsweepvalue.cc
+	psfnonsweepvalue.cc psfsweepvalue.cc psfpropertyblock.cc
 
 libpsf_la_CXXFLAGS = \
 	-I../include ${BOOST_CPPFLAGS}