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-rw-r--r--gnuradio-core/src/lib/general/gri_control_loop.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/general/gri_control_loop.h b/gnuradio-core/src/lib/general/gri_control_loop.h
index df260d2cf1..f10bc76be2 100644
--- a/gnuradio-core/src/lib/general/gri_control_loop.h
+++ b/gnuradio-core/src/lib/general/gri_control_loop.h
@@ -34,6 +34,7 @@ class GR_CORE_API gri_control_loop
float d_alpha, d_beta;
public:
+ gri_control_loop() {};
gri_control_loop(float loop_bw, float max_freq, float min_freq);
virtual ~gri_control_loop();