diff --git a/src/server/slavefuncs.h b/src/server/slavefuncs.h
--- a/src/server/slavefuncs.h
+++ b/src/server/slavefuncs.h
@@ -34,7 +34,7 @@ int ssh_keygen();
 int register_user(char *username, char *email);
 int login_user(char *username);
 int conf_replace(char *username);
-void exec_blender(struct distrenjob* distrenjob, char *input, char *output, int frame);
+void exec_blender(struct distrenjob* distrenjob, char *input, char *output, int frame, int threads);
 void xmlinit();
 void xmlcleanup();