diff --git a/lib/demapping/get_bcch_or_ccch_bursts_impl.cc b/lib/demapping/get_bcch_or_ccch_bursts_impl.cc
index 78d4280..f481294 100644
--- a/lib/demapping/get_bcch_or_ccch_bursts_impl.cc
+++ b/lib/demapping/get_bcch_or_ccch_bursts_impl.cc
@@ -23,6 +23,7 @@
 #endif
 
 #include <gnuradio/io_signature.h>
+#include <gsm/endian.h>
 #include <gsm/gsmtap.h>
 #include "get_bcch_or_ccch_bursts_impl.h"
 
diff --git a/lib/demapping/universal_ctrl_chans_demapper_impl.cc b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
index 75fa6f7..5c83598 100644
--- a/lib/demapping/universal_ctrl_chans_demapper_impl.cc
+++ b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
@@ -24,6 +24,7 @@
 
 #include <gnuradio/io_signature.h>
 #include "universal_ctrl_chans_demapper_impl.h"
+#include <gsm/endian.h>
 #include <gsm/gsmtap.h>
 
 namespace gr {