stats: Include the header file for the new class identifier
diff --git a/src/bts.cpp b/src/bts.cpp
index 78d1de5..2d8a91a 100644
--- a/src/bts.cpp
+++ b/src/bts.cpp
@@ -32,6 +32,7 @@
 extern "C" {
 	#include <osmocom/core/talloc.h>
 	#include <osmocom/core/msgb.h>
+	#include <osmocom/core/stats.h>
 }
 
 #include <arpa/inet.h>