diff --git a/src/charon/plugins/sql/pool.c b/src/charon/plugins/sql/pool.c
index c0d0c26f2..7d393b6f7 100644
--- a/src/charon/plugins/sql/pool.c
+++ b/src/charon/plugins/sql/pool.c
@@ -22,6 +22,7 @@
 #include <debug.h>
 #include <library.h>
 #include <utils/host.h>
+#include <utils/identification.h>
 
 /**
  * global database handle