diff --git a/pscp.c b/pscp.c
index 3e41454d..dc9e1f50 100644
--- a/pscp.c
+++ b/pscp.c
@@ -1528,7 +1528,7 @@ int scp_get_sink_action(struct scp_sink_action *act)
 	{
 	    char sizestr[40];
 	
-	    if (sscanf(act->buf, "%lo %s %n", &act->permissions,
+            if (sscanf(act->buf, "%lo %39s %n", &act->permissions,
                        sizestr, &i) != 2)
 		bump("Protocol error: Illegal file descriptor format");
 	    act->size = uint64_from_decimal(sizestr);