diff --git a/include/Makefile.am b/include/Makefile.am
index 317968a..f36ba4f 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -66,6 +66,7 @@
                        osmocom/gsm/protocol/gsm_12_21.h \
                        osmocom/gsm/protocol/gsm_44_318.h \
                        osmocom/gsm/protocol/ipaccess.h \
+                       osmocom/gsm/protocol/smpp34_osmocom.h \
                        osmocom/gsm/rsl.h \
                        osmocom/gsm/rxlev_stat.h \
                        osmocom/gsm/sysinfo.h \