diff --git a/lib/demapping/universal_ctrl_chans_demapper_impl.cc b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
index c9e461a..8a6bfb5 100644
--- a/lib/demapping/universal_ctrl_chans_demapper_impl.cc
+++ b/lib/demapping/universal_ctrl_chans_demapper_impl.cc
@@ -28,6 +28,7 @@
 #include "universal_ctrl_chans_demapper_impl.h"
 #include <grgsm/endian.h>
 #include <grgsm/gsmtap.h>
+#include <set>
 
 namespace gr {
   namespace gsm {