diff --git a/include/openbsc/Makefile.am b/include/openbsc/Makefile.am
index 062df34..7c848b3 100644
--- a/include/openbsc/Makefile.am
+++ b/include/openbsc/Makefile.am
@@ -1,4 +1,5 @@
 noinst_HEADERS = abis_nm.h abis_rsl.h debug.h db.h gsm_04_08.h gsm_data.h \
 		 gsm_subscriber.h linuxlist.h msgb.h select.h tlv.h gsm_04_11.h \
 		 timer.h misdn.h chan_alloc.h telnet_interface.h paging.h \
-		 subchan_demux.h trau_frame.h e1_input.h trau_mux.h signal.h
+		 subchan_demux.h trau_frame.h e1_input.h trau_mux.h signal.h \
+		 gsm_utils.h
diff --git a/include/openbsc/gsm_utils.h b/include/openbsc/gsm_utils.h
new file mode 100644
index 0000000..8e4162e
--- /dev/null
+++ b/include/openbsc/gsm_utils.h
@@ -0,0 +1,32 @@
+/* GSM utility functions, e.g. coding and decoding */
+/*
+ * (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
+ * (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
+ *
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#ifndef GSM_UTILS_H
+#define GSM_UTILS_H
+
+#include <sys/types.h>
+
+char *gsm_7bit_decode(u_int8_t *user_data, u_int8_t length);
+u_int8_t *gsm_7bit_encode(char *data);
+
+#endif