diff --git a/src/source/Signaling/StateMachine.h b/src/source/Signaling/StateMachine.h
index 5dda7bcf30..e0a7ec8cbc 100644
--- a/src/source/Signaling/StateMachine.h
+++ b/src/source/Signaling/StateMachine.h
@@ -10,6 +10,8 @@ Signaling State Machine internal include file
 extern "C" {
 #endif
 
+#include <inttypes.h>
+
 /**
  * Signaling states definitions
  */