diff --git a/lib-src/emacsclient.c b/lib-src/emacsclient.c
index 98fd8a24aa6..ed174f03b92 100644
--- a/lib-src/emacsclient.c
+++ b/lib-src/emacsclient.c
@@ -68,6 +68,7 @@ main (argc, argv)
   char string[BUFSIZ];
 
   char *getenv (), *getwd ();
+  char *getcwd ();
   int geteuid ();
 
   if (argc < 2)