diff --git a/src/librustc/mir/interpret/allocation.rs b/src/librustc/mir/interpret/allocation.rs
index 964929547b77..b7abf89e61c9 100644
--- a/src/librustc/mir/interpret/allocation.rs
+++ b/src/librustc/mir/interpret/allocation.rs
@@ -22,28 +22,6 @@ pub enum InboundsCheck {
     MaybeDead,
 }
 
-/// Used by `check_in_alloc` to indicate context of check
-#[derive(Debug, Copy, Clone, RustcEncodable, RustcDecodable, HashStable)]
-pub enum CheckInAllocMsg {
-    MemoryAccessTest,
-    NullPointerTest,
-    PointerArithmeticTest,
-    InboundsTest,
-}
-
-impl Display for CheckInAllocMsg {
-    /// When this is printed as an error the context looks like this
-    /// "{test name} failed: pointer must be in-bounds at offset..."
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", match *self {
-            CheckInAllocMsg::MemoryAccessTest => "Memory access",
-            CheckInAllocMsg::NullPointerTest => "Null pointer test",
-            CheckInAllocMsg::PointerArithmeticTest => "Pointer arithmetic",
-            CheckInAllocMsg::InboundsTest => "Inbounds test",
-        })
-    }
-}
-
 #[derive(Clone, Debug, Eq, PartialEq, PartialOrd, Ord, Hash, RustcEncodable, RustcDecodable)]
 pub struct Allocation<Tag=(),Extra=()> {
     /// The actual bytes of the allocation.
diff --git a/src/librustc/mir/interpret/mod.rs b/src/librustc/mir/interpret/mod.rs
index a36c78802295..4b1a69404dde 100644
--- a/src/librustc/mir/interpret/mod.rs
+++ b/src/librustc/mir/interpret/mod.rs
@@ -19,10 +19,10 @@ pub use self::value::{Scalar, ScalarMaybeUndef, RawConst, ConstValue};
 
 pub use self::allocation::{
     InboundsCheck, Allocation, AllocationExtra,
-    Relocations, UndefMask, CheckInAllocMsg,
+    Relocations, UndefMask,
 };
 
-pub use self::pointer::{Pointer, PointerArithmetic};
+pub use self::pointer::{Pointer, PointerArithmetic, CheckInAllocMsg};
 
 use std::fmt;
 use crate::mir;
diff --git a/src/librustc/mir/interpret/pointer.rs b/src/librustc/mir/interpret/pointer.rs
index 26002a411d4b..f5c5469fe1b2 100644
--- a/src/librustc/mir/interpret/pointer.rs
+++ b/src/librustc/mir/interpret/pointer.rs
@@ -5,9 +5,31 @@ use crate::ty::layout::{self, HasDataLayout, Size};
 use rustc_macros::HashStable;
 
 use super::{
-    AllocId, InterpResult, CheckInAllocMsg
+    AllocId, InterpResult,
 };
 
+/// Used by `check_in_alloc` to indicate context of check
+#[derive(Debug, Copy, Clone, RustcEncodable, RustcDecodable, HashStable)]
+pub enum CheckInAllocMsg {
+    MemoryAccessTest,
+    NullPointerTest,
+    PointerArithmeticTest,
+    InboundsTest,
+}
+
+impl Display for CheckInAllocMsg {
+    /// When this is printed as an error the context looks like this
+    /// "{test name} failed: pointer must be in-bounds at offset..."
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", match *self {
+            CheckInAllocMsg::MemoryAccessTest => "Memory access",
+            CheckInAllocMsg::NullPointerTest => "Null pointer test",
+            CheckInAllocMsg::PointerArithmeticTest => "Pointer arithmetic",
+            CheckInAllocMsg::InboundsTest => "Inbounds test",
+        })
+    }
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Pointer arithmetic
 ////////////////////////////////////////////////////////////////////////////////