diff --git a/librustzcash/src/rustzcash.rs b/librustzcash/src/rustzcash.rs
index 7e7c1a02b..bcd6f8806 100644
--- a/librustzcash/src/rustzcash.rs
+++ b/librustzcash/src/rustzcash.rs
@@ -181,7 +181,7 @@ pub extern "system" fn librustzcash_init_zksnark_params(
     let sprout_path = if sprout_path.is_null() {
         None
     } else {
-        Some(OsStr::from_wide(unsafe {
+        Some(OsString::from_wide(unsafe {
             slice::from_raw_parts(sprout_path, sprout_path_len)
         }))
     };