diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index c738d07..e700f2e 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -9126,8 +9126,9 @@
     void
 ex_cd(exarg_T *eap)
 {
-    char_u		*new_dir;
-    char_u		*tofree;
+    char_u	*new_dir;
+    char_u	*tofree;
+    int		dir_differs;
 
     new_dir = eap->arg;
 #if !defined(UNIX) && !defined(VMS)
@@ -9183,7 +9184,9 @@
 	    new_dir = NameBuff;
 	}
 #endif
-	if (new_dir == NULL || vim_chdir(new_dir))
+	dir_differs = new_dir == NULL || prev_dir == NULL
+					     || STRCMP(prev_dir, new_dir) != 0;
+	if (new_dir == NULL || (dir_differs && vim_chdir(new_dir)))
 	    EMSG(_(e_failed));
 	else
 	{
@@ -9195,9 +9198,11 @@
 	    /* Echo the new current directory if the command was typed. */
 	    if (KeyTyped || p_verbose >= 5)
 		ex_pwd(eap);
-	    apply_autocmds(EVENT_DIRCHANGED,
-		    is_local_chdir ? (char_u *)"window" : (char_u *)"global",
-		    new_dir, FALSE, curbuf);
+
+	    if (dir_differs)
+		apply_autocmds(EVENT_DIRCHANGED,
+		      is_local_chdir ? (char_u *)"window" : (char_u *)"global",
+		      new_dir, FALSE, curbuf);
 	}
 	vim_free(tofree);
     }