1 files changed, 1 insertions, 0 deletions

diff --git a/include/libbb.h b/include/libbb.h
index b93b7a618..5877a4a83 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -171,6 +171,7 @@ extern void xstat(const char *filename, struct stat *buf);
 extern int  bb_xsocket(int domain, int type, int protocol);
 extern pid_t bb_spawn(char **argv);
 extern pid_t bb_xspawn(char **argv);
+extern int wait4pid(int pid);
 extern void bb_xdaemon(int nochdir, int noclose);
 extern void bb_xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen);
 extern void bb_xlisten(int s, int backlog);