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-rw-r--r--src/libcore/iter/range.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/libcore/iter/range.rs b/src/libcore/iter/range.rs
index 72b48b56571..5d57207763e 100644
--- a/src/libcore/iter/range.rs
+++ b/src/libcore/iter/range.rs
@@ -488,6 +488,7 @@ macro_rules! try_from_unbounded {
 }
 
 // unsigned to signed (only positive bound)
+#[cfg(any(target_pointer_width = "32", target_pointer_width = "64"))]
 macro_rules! try_from_upper_bounded {
     ($($target:ty),*) => {$(
         impl PrivateTryFromUsize for $target {