diff --git a/src/librustc_mir/const_eval.rs b/src/librustc_mir/const_eval.rs
index 005d3b217eb3d..133ab31524723 100644
--- a/src/librustc_mir/const_eval.rs
+++ b/src/librustc_mir/const_eval.rs
@@ -328,14 +328,14 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for CompileTimeInterpreter<'mir,
         false // for now, we don't enforce validity
     }
 
-    fn find_fn(
+    fn find_mir_or_eval_fn(
         ecx: &mut InterpCx<'mir, 'tcx, Self>,
         instance: ty::Instance<'tcx>,
         args: &[OpTy<'tcx>],
         ret: Option<(PlaceTy<'tcx>, mir::BasicBlock)>,
         _unwind: Option<mir::BasicBlock> // unwinding is not supported in consts
     ) -> InterpResult<'tcx, Option<&'mir mir::Body<'tcx>>> {
-        debug!("eval_fn_call: {:?}", instance);
+        debug!("find_mir_or_eval_fn: {:?}", instance);
 
         // If this function is a `const fn` then as an optimization we can query this
         // evaluation immediately.
diff --git a/src/librustc_mir/interpret/machine.rs b/src/librustc_mir/interpret/machine.rs
index b7cde626415a7..7f5873cebf621 100644
--- a/src/librustc_mir/interpret/machine.rs
+++ b/src/librustc_mir/interpret/machine.rs
@@ -146,7 +146,7 @@ pub trait Machine<'mir, 'tcx>: Sized {
     /// nor just jump to `ret`, but instead push their own stack frame.)
     /// Passing `dest`and `ret` in the same `Option` proved very annoying when only one of them
     /// was used.
-    fn find_fn(
+    fn find_mir_or_eval_fn(
         ecx: &mut InterpCx<'mir, 'tcx, Self>,
         instance: ty::Instance<'tcx>,
         args: &[OpTy<'tcx, Self::PointerTag>],
diff --git a/src/librustc_mir/interpret/terminator.rs b/src/librustc_mir/interpret/terminator.rs
index ed037570d6db8..674051ecd8f16 100644
--- a/src/librustc_mir/interpret/terminator.rs
+++ b/src/librustc_mir/interpret/terminator.rs
@@ -285,7 +285,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
             ty::InstanceDef::CloneShim(..) |
             ty::InstanceDef::Item(_) => {
                 // We need MIR for this fn
-                let body = match M::find_fn(self, instance, args, ret, unwind)? {
+                let body = match M::find_mir_or_eval_fn(self, instance, args, ret, unwind)? {
                     Some(body) => body,
                     None => return Ok(()),
                 };
diff --git a/src/librustc_mir/transform/const_prop.rs b/src/librustc_mir/transform/const_prop.rs
index 8de16308e8375..22f25aa93a392 100644
--- a/src/librustc_mir/transform/const_prop.rs
+++ b/src/librustc_mir/transform/const_prop.rs
@@ -139,7 +139,7 @@ impl<'mir, 'tcx> interpret::Machine<'mir, 'tcx> for ConstPropMachine {
         false
     }
 
-    fn find_fn(
+    fn find_mir_or_eval_fn(
         _ecx: &mut InterpCx<'mir, 'tcx, Self>,
         _instance: ty::Instance<'tcx>,
         _args: &[OpTy<'tcx>],