diff --git a/clite/core.js b/clite/core.js
index 01d75e2..e622620 100644
--- a/clite/core.js
+++ b/clite/core.js
@@ -1317,11 +1317,15 @@ clite.shell = {
 			if (args.length > 1) {
 				dir = clite.lib.resolvePath(args[1]);
 			}
-			var fd = clite.io.open(dir);
+			var fd = clite.io.open(dir,false);
 			if (!fd) {
 				io.error('invalid directory: '+dir);
 				return;
 			}
+			if (!fd.node.data.isdir) {
+				io.error('invalid directory: '+dir);
+				return;
+			}
 			clite.io.close(fd);
 			clite.shell.env.PWD = dir;
 			clite.shell.prompt.generate();
@@ -1341,7 +1345,7 @@ clite.shell = {
 				return;
 			}else{
 				var path = clite.shell.resolvePath(args[1]);
-				var fd = clite.io.open(path);
+				var fd = clite.io.open(path,false);
 				if (!fd)
 					return;
 				clite.io.close(fd);
@@ -1355,7 +1359,7 @@ clite.shell = {
 				io.write(args[1]+' is a shell builtin');
 			}else{
 				var path = clite.shell.resolvePath(args[1]);
-				var fd = clite.io.open(path);
+				var fd = clite.io.open(path,false);
 				if (!fd)
 					return;
 				clite.io.close(fd);