diff --git a/src/unix/bsd/netbsdlike/netbsd/other/mod.rs b/src/unix/bsd/netbsdlike/netbsd/other/mod.rs
index f4e7cc406125b..3a9bf0866c0bc 100644
--- a/src/unix/bsd/netbsdlike/netbsd/other/mod.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/other/mod.rs
@@ -1,5 +1,6 @@
 cfg_if! {
-    if #[cfg(target_arch = "x86_64")] {
+    if #[cfg(any(target_arch = "sparc64",
+                 target_arch = "x86_64"))] {
         mod b64;
         pub use self::b64::*;
     } else if #[cfg(any(target_arch = "arm",