diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am
index 94f137e..55b772f 100644
--- a/src/gsm/Makefile.am
+++ b/src/gsm/Makefile.am
@@ -8,7 +8,7 @@
 lib_LTLIBRARIES = libosmogsm.la
 
 libosmogsm_la_SOURCES = a5.c rxlev_stat.c tlv_parser.c comp128.c gsm_utils.c \
-                        rsl.c gsm48.c gsm48_ie.c gsm0808.c \
+                        rsl.c gsm48.c gsm48_ie.c gsm0808.c sysinfo.c \
 			gprs_cipher_core.c gsm0480.c abis_nm.c
 libosmogsm_la_LDFLAGS = -version-info $(LIBVERSION)
 libosmogsm_la_LIBADD = $(top_builddir)/src/libosmocore.la