diff --git a/rust/bssl-sys/src/lib.rs b/rust/bssl-sys/src/lib.rs
index 06b907c..718509e 100644
--- a/rust/bssl-sys/src/lib.rs
+++ b/rust/bssl-sys/src/lib.rs
@@ -6,14 +6,17 @@
 include!(env!("BINDGEN_RS_FILE"));
 
 // TODO(crbug.com/boringssl/596): Remove these wrappers.
+#[cfg(unsupported_inline_wrappers)]
 pub fn ERR_GET_LIB(packed_error: u32) -> i32 {
     unsafe { ERR_GET_LIB_RUST(packed_error) }
 }
 
+#[cfg(unsupported_inline_wrappers)]
 pub fn ERR_GET_REASON(packed_error: u32) -> i32 {
     unsafe { ERR_GET_REASON_RUST(packed_error) }
 }
 
+#[cfg(unsupported_inline_wrappers)]
 pub fn ERR_GET_FUNC(packed_error: u32) -> i32 {
     unsafe { ERR_GET_FUNC_RUST(packed_error) }
 }