diff --git a/include/osmocom/gsm/abis_nm.h b/include/osmocom/gsm/abis_nm.h
index 4dee012..4682ead 100644
--- a/include/osmocom/gsm/abis_nm.h
+++ b/include/osmocom/gsm/abis_nm.h
@@ -43,7 +43,7 @@
 
 
 int abis_nm_chcomb4pchan(enum gsm_phys_chan_config pchan);
-enum abis_nm_chan_comb abis_nm_pchan4chcomb(uint8_t chcomb);
+enum gsm_phys_chan_config abis_nm_pchan4chcomb(uint8_t chcomb);
 
 /*! @} */