diff --git a/openbsc/src/gprs/Makefile.am b/openbsc/src/gprs/Makefile.am
index ac177f7fd..2b4292398 100644
--- a/openbsc/src/gprs/Makefile.am
+++ b/openbsc/src/gprs/Makefile.am
@@ -9,9 +9,9 @@ libsgsn_a_SOURCES = gprs_ns.c gprs_bssgp.c gprs_llc.c gsm_04_08_gprs.c \
 		crc24.c gprs_sgsn.c
 
 osmo_gbproxy_SOURCES = gb_proxy.c gb_proxy_main.c gb_proxy_vty.c \
-			gprs_ns.c ../socket.c ../debug.c
-osmo_gbproxy_LDADD = ../libvty.a
+			gprs_ns.c $(top_srcdir)/src/socket.c $(top_srcdir)/src/debug.c
+osmo_gbproxy_LDADD = $(top_builddir)/src/libvty.a
 
 osmo_sgsn_SOURCES = sgsn_main.c sgsn_vty.c \
-			../socket.c ../debug.c
-osmo_sgsn_LDADD = ../libvty.a libsgsn.a
+			$(top_srcdir)/src/socket.c $(top_srcdir)/src/debug.c
+osmo_sgsn_LDADD = $(top_builddir)/src/libvty.a libsgsn.a
diff --git a/openbsc/src/ipaccess/Makefile.am b/openbsc/src/ipaccess/Makefile.am
index 7a13ee175..533932142 100644
--- a/openbsc/src/ipaccess/Makefile.am
+++ b/openbsc/src/ipaccess/Makefile.am
@@ -7,6 +7,7 @@ sbin_PROGRAMS = ipaccess-find ipaccess-config ipaccess-proxy
 ipaccess_find_SOURCES = ipaccess-find.c
 
 ipaccess_config_SOURCES = ipaccess-config.c ipaccess-firmware.c
-ipaccess_config_LDADD = ../libbsc.a ../libmsc.a ../libbsc.a ../libvty.a -ldl -ldbi $(LIBCRYPT)
+ipaccess_config_LDADD = $(top_builddir)/src/libbsc.a $(top_builddir)/src/libmsc.a \
+			$(top_builddir)/src/libbsc.a $(top_builddir)/src/libvty.a -ldl -ldbi $(LIBCRYPT)
 
 ipaccess_proxy_SOURCES = ipaccess-proxy.c ../debug.c