diff --git a/compiler/rustc_const_eval/src/interpret/machine.rs b/compiler/rustc_const_eval/src/interpret/machine.rs
index 82aca3d30a2..0fe99085d67 100644
--- a/compiler/rustc_const_eval/src/interpret/machine.rs
+++ b/compiler/rustc_const_eval/src/interpret/machine.rs
@@ -441,6 +441,7 @@ fn init_frame_extra(
         frame: Frame<'mir, 'tcx, Self::Provenance>,
     ) -> InterpResult<'tcx, Frame<'mir, 'tcx, Self::Provenance, Self::FrameExtra>>;
 
+    #[inline(always)]
     fn cur_span(ecx: &InterpCx<'mir, 'tcx, Self>) -> Span
     where
         'tcx: 'mir,