diff --git a/lib/decoding/CMakeLists.txt b/lib/decoding/CMakeLists.txt
new file mode 100644
index 0000000..0305a07
--- /dev/null
+++ b/lib/decoding/CMakeLists.txt
@@ -0,0 +1,28 @@
+# Copyright 2011,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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 3, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+
+add_sources(
+    control_channels_decoder_impl.cc
+    tch_f_decoder_impl.cc
+    sch.c
+)
+
+add_subdirectory(osmocom/coding)
+add_subdirectory(openbts)
diff --git a/lib/decoding/openbts/CMakeLists.txt b/lib/decoding/openbts/CMakeLists.txt
new file mode 100644
index 0000000..eb857bf
--- /dev/null
+++ b/lib/decoding/openbts/CMakeLists.txt
@@ -0,0 +1,28 @@
+# Copyright 2011,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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 3, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+add_sources(
+    AmrCoder.cpp
+    BitVector.cpp
+    GSM610Tables.cpp
+    GSM660Tables.cpp
+    GSM503Tables.cpp
+    ViterbiR204.cpp
+)
+
diff --git a/lib/decoding/osmocom/coding/CMakeLists.txt b/lib/decoding/osmocom/coding/CMakeLists.txt
new file mode 100644
index 0000000..615a2f6
--- /dev/null
+++ b/lib/decoding/osmocom/coding/CMakeLists.txt
@@ -0,0 +1,28 @@
+# Copyright 2011,2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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 3, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+add_sources(APPEND grgsm_sources
+    gsm0503_conv.c
+    gsm0503_coding.c
+    gsm0503_interleaving.c
+    gsm0503_mapping.c
+    gsm0503_parity.c
+    gsm0503_tables.c
+)
+