diff --git a/audio-mixer/src/main.cpp b/audio-mixer/src/main.cpp
index 06c2300315..c725637184 100644
--- a/audio-mixer/src/main.cpp
+++ b/audio-mixer/src/main.cpp
@@ -16,6 +16,7 @@
 #include <errno.h>
 #include <fstream>
 #include <limits>
+#include <signal.h>
 
 #include <AgentList.h>
 #include <AgentTypes.h>