diff --git a/source/tdb/tdbdump.c b/source/tdb/tdbdump.c
index 66642132093..9c1dc2761b6 100644
--- a/source/tdb/tdbdump.c
+++ b/source/tdb/tdbdump.c
@@ -30,6 +30,7 @@
 #include <sys/stat.h>
 #include <sys/time.h>
 #include <ctype.h>
+#include <signal.h>
 #include "tdb.h"
 
 static void print_data(TDB_DATA d)