diff --git a/configure.ac b/configure.ac
index 1ebd185..9ceb679 100644
--- a/configure.ac
+++ b/configure.ac
@@ -32,6 +32,7 @@ PKG_PROG_PKG_CONFIG([0.20])
 
 dnl checks for libraries
 PKG_CHECK_MODULES(LIBOSMOCORE, libosmocore >= 1.7.0)
+PKG_CHECK_MODULES(LIBOSMOGSM, libosmogsm >= 1.7.0)
 
 dnl checks for header files
 AC_HEADER_STDC
diff --git a/contrib/libosmo-gprs.spec.in b/contrib/libosmo-gprs.spec.in
index 9c27c2d..b560769 100644
--- a/contrib/libosmo-gprs.spec.in
+++ b/contrib/libosmo-gprs.spec.in
@@ -11,6 +11,7 @@ BuildRequires:  automake >= 1.9
 BuildRequires:  libtool >= 2
 BuildRequires:  pkgconfig >= 0.20
 BuildRequires:  pkgconfig(libosmocore) >= 1.7.0
+BuildRequires:  pkgconfig(libosmogsm) >= 1.7.0
 BuildRequires:  pkgconfig(talloc)
 
 %description
diff --git a/libosmo-gprs-llc.pc.in b/libosmo-gprs-llc.pc.in
index 25a6509..7502d95 100644
--- a/libosmo-gprs-llc.pc.in
+++ b/libosmo-gprs-llc.pc.in
@@ -6,7 +6,7 @@ includedir=@includedir@
 Name: Osmocom [E]GPRS LLC (Logical Link Control) Library
 Description: C Utility Library
 Version: @VERSION@
-Requires: libosmocore
+Requires: libosmocore, libosmogsm
 Requires.private: talloc
 Libs: -L${libdir} -losmo-gprs-llc
 Cflags: -I${includedir}/
diff --git a/src/llc/Makefile.am b/src/llc/Makefile.am
index 6c0e680..c25841e 100644
--- a/src/llc/Makefile.am
+++ b/src/llc/Makefile.am
@@ -11,10 +11,12 @@ AM_CPPFLAGS = \
 AM_CFLAGS = \
 	-Wall \
 	$(LIBOSMOCORE_CFLAGS) \
+	$(LIBOSMOGSM_CFLAGS) \
 	$(NULL)
 
 AM_LDFLAGS = \
 	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOGSM_LIBS) \
 	$(NULL)
 
 lib_LTLIBRARIES = \
@@ -36,4 +38,5 @@ libosmo_gprs_llc_la_LDFLAGS = \
 
 libosmo_gprs_llc_la_LIBADD = \
 	$(LIBOSMOCORE_LIBS) \
+	$(LIBOSMOGSM_LIBS) \
 	$(NULL)
diff --git a/tests/llc/Makefile.am b/tests/llc/Makefile.am
index 0079964..2c9d578 100644
--- a/tests/llc/Makefile.am
+++ b/tests/llc/Makefile.am
@@ -1,6 +1,7 @@
 AM_CFLAGS = \
 	-Wall \
 	$(LIBOSMOCORE_CFLAGS) \
+	$(LIBOSMOGSM_CFLAGS) \
 	-I$(top_srcdir)/include/ \
 	$(NULL)