1 files changed, 4 insertions, 0 deletions
diff --git a/gr-analog/lib/squelch_base_cc_impl.cc b/gr-analog/lib/squelch_base_cc_impl.cc
index c62efc339b..3255d3bde4 100644
--- a/gr-analog/lib/squelch_base_cc_impl.cc
+++ b/gr-analog/lib/squelch_base_cc_impl.cc
@@ -55,6 +55,7 @@ namespace gr {
     void
     squelch_base_cc_impl::set_ramp(int ramp)
     {
+      gr::thread::scoped_lock l(d_setlock);
       d_ramp = ramp;
     }
 
@@ -67,6 +68,7 @@ namespace gr {
     void
     squelch_base_cc_impl::set_gate(bool gate)
     {
+      gr::thread::scoped_lock l(d_setlock);
       d_gate = gate;
     }
 
@@ -87,6 +89,8 @@ namespace gr {
 
       int j = 0;
 
+      gr::thread::scoped_lock l(d_setlock);
+
       for(int i = 0; i < noutput_items; i++) {
 	update_state(in[i]);