diff --git a/src/client.h b/src/client.h
index a29012c48686e5e15f2d21b96035edb2f4962ef8..38d20ede3e1ff800e61371c71c25a6f20ebacc21 100644
--- a/src/client.h
+++ b/src/client.h
@@ -37,5 +37,6 @@ static const char *exe = "bin/client";
 
 /* Functions */
 static char *read_version_file(char *);
+void availability(struct soap *, char *, char *, char *);
 
 #endif