add gsmtap.h
diff --git a/libosmocore/include/osmocore/Makefile.am b/libosmocore/include/osmocore/Makefile.am
index 189c767..f213230 100644
--- a/libosmocore/include/osmocore/Makefile.am
+++ b/libosmocore/include/osmocore/Makefile.am
@@ -1,4 +1,5 @@
 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
+		   tlv.h bitvec.h comp128.h statistics.h gsm_utils.h utils.h \
+		   gsmtap.h
 
 osmocoredir = $(includedir)/osmocore