diff --git a/src/builtin.c b/src/builtin.c
index 6c87c12..1005c36 100644
--- a/src/builtin.c
+++ b/src/builtin.c
@@ -62,6 +62,7 @@ static struct builtin builtins[] = {
        {"kill",        kill_builtin,           0},
        {"emacs",       emacs_builtin,          0},
        {"alias",       alias_builtin,          0},
+       {"unalias",     unalias_builtin,        0},
 };

 /**
diff --git a/src/builtins/alias.c b/src/builtins/alias.c
index d880592..bb7b108 100644
--- a/src/builtins/alias.c
+++ b/src/builtins/alias.c
@@ -89,6 +89,24 @@ int alias_builtin(int argc, char **args)
        return 0;
 }

+int unalias_builtin(int argc, char **args)
+{
+       int i;
+
+       if (argc < 2) {
+               fprintf(stderr, "usage: alias name [name ...]\n");
+               return 1;
+       }
+
+       for (i = 1; i < argc; i++) {
+               if (remove_hash_key(aliases, args[i])) {
+                       builtin_error(__FUNCTION__, "%s: %s", args[i], "not found");
+               }
+       }
+
+       return 0;
+}
+
 void find_alias(expr *e)
 {
        if (aliases == NULL)
diff --git a/src/builtins/builtins.h b/src/builtins/builtins.h
index 4f594ea..f38725a 100644
--- a/src/builtins/builtins.h
+++ b/src/builtins/builtins.h
@@ -64,5 +64,6 @@ int kill_builtin(int, char **);
 // alias.c
 int alias_builtin(int, char **);
 void find_alias(expr *);
+int unalias_builtin(int, char **);

 #endif /* __builtins_h */
(END)