diff --git a/library/core/Cargo.toml b/library/core/Cargo.toml
index a02fcf50416..11d33971f25 100644
--- a/library/core/Cargo.toml
+++ b/library/core/Cargo.toml
@@ -31,6 +31,8 @@ rand_xorshift = { version = "0.3.0", default-features = false }
 [features]
 # Make panics and failed asserts immediately abort without formatting any message
 panic_immediate_abort = []
+# Choose algorithms that are optimized for binary size instead of runtime performance
+optimize_for_size = []
 # Make `RefCell` store additional debugging information, which is printed out when
 # a borrow error occurs
 debug_refcell = []