diff --git a/src/Makefile.am b/src/Makefile.am
index 3a68927..e52a597 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -18,7 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
-AM_CPPFLAGS = $(STD_DEFINES_AND_INCLUDES)
+AM_CPPFLAGS = $(STD_DEFINES_AND_INCLUDES) $(LIBOSMOCORE_CFLAGS) $(LIBOSMOGB_CFLAGS) $(LIBOSMOGSM_CFLAGS)
 AM_CXXFLAGS = -Wall -ldl -pthread
 
 noinst_LTLIBRARIES = libgprs.la