diff --git a/include/osmocore/Makefile.am b/include/osmocore/Makefile.am
index 8754295..b45d023 100644
--- a/include/osmocore/Makefile.am
+++ b/include/osmocore/Makefile.am
@@ -1,6 +1,6 @@
 osmocore_HEADERS = signal.h linuxlist.h timer.h talloc.h msgb.h select.h \
 		   tlv.h bitvec.h comp128.h statistics.h gsm_utils.h utils.h \
-		   gsmtap.h write_queue.h rsl.h
+		   gsmtap.h write_queue.h rsl.h gsm48.h
 
 osmocoredir = $(includedir)/osmocore