diff --git a/openbsc/tests/mgcp/Makefile.am b/openbsc/tests/mgcp/Makefile.am
index 82d6ac6..4b18036 100644
--- a/openbsc/tests/mgcp/Makefile.am
+++ b/openbsc/tests/mgcp/Makefile.am
@@ -1,30 +1,72 @@
-AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_srcdir)
-AM_CFLAGS=-Wall -ggdb3 $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGSM_FLAGS) $(LIBOSMONETIF_CFLAGS) $(LIBOSMOSCCP_CFLAGS) $(COVERAGE_CFLAGS) $(LIBBCG729_CFLAGS)
-AM_LDFLAGS = $(COVERAGE_LDFLAGS)
+AM_CPPFLAGS = \
+	$(all_includes) \
+	-I$(top_srcdir)/include \
+	-I$(top_srcdir) \
+	$(NULL)
 
-EXTRA_DIST = mgcp_test.ok mgcp_transcoding_test.ok
+AM_CFLAGS = \
+	-Wall \
+	-ggdb3 \
+	$(LIBOSMOCORE_CFLAGS) \
+	$(LIBOSMOGSM_FLAGS) \
+	$(LIBOSMONETIF_CFLAGS) \
+	$(LIBOSMOSCCP_CFLAGS) \
+	$(COVERAGE_CFLAGS) \
+	$(LIBBCG729_CFLAGS) \
+	$(NULL)
 
-noinst_PROGRAMS = mgcp_test
+AM_LDFLAGS = \
+	$(COVERAGE_LDFLAGS) \
+	$(NULL)
 
+EXTRA_DIST = \
+	mgcp_test.ok \
+	mgcp_transcoding_test.ok \
+	$(NULL)
+
+noinst_PROGRAMS = \
+	mgcp_test \
+	$(NULL)
 if BUILD_MGCP_TRANSCODING
-noinst_PROGRAMS += mgcp_transcoding_test
+noinst_PROGRAMS += \
+	mgcp_transcoding_test \
+	$(NULL)
 endif
 
-mgcp_test_SOURCES = mgcp_test.c
+mgcp_test_SOURCES = \
+	mgcp_test.c \
+	$(NULL)
 
-mgcp_test_LDADD = $(top_builddir)/src/libbsc/libbsc.a \
-		$(top_builddir)/src/libmgcp/libmgcp.a \
-		$(top_builddir)/src/libcommon/libcommon.a \
-		$(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) \
-		-lrt -lm $(LIBOSMOSCCP_LIBS) $(LIBOSMOVTY_LIBS) \
-		$(LIBRARY_DL) $(LIBOSMONETIF_LIBS)
+mgcp_test_LDADD = \
+	$(top_builddir)/src/libbsc/libbsc.a \
+	$(top_builddir)/src/libmgcp/libmgcp.a \
+	$(top_builddir)/src/libcommon/libcommon.a \
+	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOGSM_LIBS) \
+	$(LIBOSMOSCCP_LIBS) \
+	$(LIBOSMOVTY_LIBS) \
+	$(LIBRARY_DL) \
+	$(LIBOSMONETIF_LIBS) \
+	-lrt \
+	-lm  \
+	$(NULL)
 
-mgcp_transcoding_test_SOURCES = mgcp_transcoding_test.c
+mgcp_transcoding_test_SOURCES = \
+	mgcp_transcoding_test.c \
+	$(NULL)
 
 mgcp_transcoding_test_LDADD = \
-		$(top_builddir)/src/libbsc/libbsc.a \
-		$(top_builddir)/src/libmgcp/libmgcp.a \
-		$(top_builddir)/src/libcommon/libcommon.a \
-		$(LIBOSMOCORE_LIBS) $(LIBOSMOGSM_LIBS) \
-		$(LIBBCG729_LIBS) -lrt -lm $(LIBOSMOSCCP_LIBS) $(LIBOSMOVTY_LIBS) \
-		$(LIBRARY_DL) $(LIBOSMONETIF_LIBS) $(LIBRARY_GSM)
+	$(top_builddir)/src/libbsc/libbsc.a \
+	$(top_builddir)/src/libmgcp/libmgcp.a \
+	$(top_builddir)/src/libcommon/libcommon.a \
+	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOGSM_LIBS) \
+	$(LIBBCG729_LIBS) \
+	$(LIBOSMOSCCP_LIBS) \
+	$(LIBOSMOVTY_LIBS) \
+	$(LIBRARY_DL) \
+	$(LIBOSMONETIF_LIBS) \
+	$(LIBRARY_GSM) \
+	-lrt \
+	-lm \
+	$(NULL)