diff --git a/jsc/wasm32/wasm32.jsc b/jsc/wasm32/wasm32.jsc
index 7082c0b7..8145bab4 100644
--- a/jsc/wasm32/wasm32.jsc
+++ b/jsc/wasm32/wasm32.jsc
@@ -5474,9 +5474,19 @@ ThinThin.chdir = function (ptr)
 {
     var path = CStringAt(this.HEAPU8, ptr);
     if (path === "./")
-	this.pwd = ".";
-    else
-	this.pwd += "/" + path;
+	path = "..";
+    //if (path === "./")
+    //this.pwd = ".";
+    //else
+    this.pwd += "/" + path;
+    while (this.pwd.match(/\/\.\.\//))
+	this.pwd = this.pwd.replace(/\/([^/]+)\/\.\.\//, "/");
+    while (this.pwd.match(/\/\.\.$/))
+	this.pwd = this.pwd.replace(/\/([^/]+)\/\.\.$/, "/");
+    while (this.pwd.match(/\/\//))
+	this.pwd = this.pwd.replace(/\/\//, "/");
+    while (this.pwd.match(/\/$/))
+	this.pwd = this.pwd.replace(/\/$/, "");
     return Promise.resolve(0);
 };