diff --git a/compiler/rustc_const_eval/src/interpret/intrinsics.rs b/compiler/rustc_const_eval/src/interpret/intrinsics.rs
index a2b8647a965c8..9ad945359b6b3 100644
--- a/compiler/rustc_const_eval/src/interpret/intrinsics.rs
+++ b/compiler/rustc_const_eval/src/interpret/intrinsics.rs
@@ -457,7 +457,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 assert_eq!(input_len, dest_len, "Return vector length must match input length");
                 assert!(
                     index < dest_len,
-                    "Index `{}` must be in bounds of vector with length `{}`",
+                    "Index `{}` must be in bounds of vector with length {}",
                     index,
                     dest_len
                 );
@@ -477,7 +477,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
                 let (input, input_len) = self.operand_to_simd(&args[0])?;
                 assert!(
                     index < input_len,
-                    "index `{}` must be in bounds of vector with length `{}`",
+                    "index `{}` must be in bounds of vector with length {}",
                     index,
                     input_len
                 );