diff --git a/exec/binkit.js b/exec/binkit.js
index 08773f36db548c8e2343b1372abc4e72e2bfa0b7..85880ee8e85c817e9ff422167e7b0ffcf8cd74b3 100644
--- a/exec/binkit.js
+++ b/exec/binkit.js
@@ -161,6 +161,8 @@ function add_outbound_files(addrs, bp)
 				var fnchars = '0123456789abcdefghijklmnopqrstuvwxyz';
 				var fname;
 
+				if(file_isdir(file))
+					return;
 				var ext = file_getext(file);
 				if (ext !== undefined)
 					ext = ext.toLowerCase();