diff --git a/src/comp/back/x86.rs b/src/comp/back/x86.rs
index 018ae876ea60..903a5485dcba 100644
--- a/src/comp/back/x86.rs
+++ b/src/comp/back/x86.rs
@@ -2,7 +2,6 @@
 import lib::llvm::llvm;
 import lib::llvm::llvm::ModuleRef;
 import std::str;
-import std::vec;
 import std::os::target_os;
 
 fn get_module_asm() -> str { ret ""; }
diff --git a/src/comp/front/config.rs b/src/comp/front/config.rs
index 96f3bbb17438..091cc69cd019 100644
--- a/src/comp/front/config.rs
+++ b/src/comp/front/config.rs
@@ -1,6 +1,5 @@
 import std::ivec;
 import std::option;
-import std::vec;
 import syntax::ast;
 import syntax::fold;
 import attr;
diff --git a/src/comp/middle/tstate/annotate.rs b/src/comp/middle/tstate/annotate.rs
index e82414959ac8..680538fc5176 100644
--- a/src/comp/middle/tstate/annotate.rs
+++ b/src/comp/middle/tstate/annotate.rs
@@ -1,5 +1,4 @@
 
-import std::vec;
 import std::option;
 import std::option::some;
 import std::option::none;
diff --git a/src/comp/middle/tstate/auxiliary.rs b/src/comp/middle/tstate/auxiliary.rs
index ea9ae5ad5c37..500fd9fc9ff0 100644
--- a/src/comp/middle/tstate/auxiliary.rs
+++ b/src/comp/middle/tstate/auxiliary.rs
@@ -1,4 +1,3 @@
-import std::vec;
 import std::ivec;
 import std::int::str;
 import std::str;
diff --git a/src/comp/util/common.rs b/src/comp/util/common.rs
index 36fe252bf3ec..d55c8bba3d5a 100644
--- a/src/comp/util/common.rs
+++ b/src/comp/util/common.rs
@@ -3,7 +3,6 @@ import std::map;
 import std::map::hashmap;
 import std::uint;
 import std::int;
-import std::vec;
 import std::option;
 import std::option::none;
 import std::option::some;