diff --git a/src/pipeline/ToneInterfererStep.cpp b/src/pipeline/ToneInterfererStep.cpp
index ef5b69275..57bad6c3d 100644
--- a/src/pipeline/ToneInterfererStep.cpp
+++ b/src/pipeline/ToneInterfererStep.cpp
@@ -23,7 +23,7 @@
 #include <cassert>
 #include <cstring>
 #include <cmath>
-
+#include "util.h"
 #include "ToneInterfererStep.h"
 
 ToneInterfererStep::ToneInterfererStep(