diff --git a/zcash_proofs/src/lib.rs b/zcash_proofs/src/lib.rs
index 7faca6c35..7c579bf24 100644
--- a/zcash_proofs/src/lib.rs
+++ b/zcash_proofs/src/lib.rs
@@ -12,6 +12,11 @@ use std::fs::File;
 use std::io::{self, BufReader};
 use std::path::Path;
 
+#[cfg(feature = "directories")]
+use directories::BaseDirs;
+#[cfg(feature = "directories")]
+use std::path::PathBuf;
+
 pub mod circuit;
 mod hashreader;
 pub mod sapling;
@@ -20,6 +25,22 @@ pub mod sprout;
 #[cfg(feature = "local-prover")]
 pub mod prover;
 
+// Circuit names
+const SAPLING_SPEND_NAME: &str = "sapling-spend.params";
+const SAPLING_OUTPUT_NAME: &str = "sapling-output.params";
+
+/// Returns the default folder that the Zcash proving parameters are located in.
+#[cfg(feature = "directories")]
+fn default_params_folder() -> Option<PathBuf> {
+    BaseDirs::new().map(|base_dirs| {
+        if cfg!(any(windows, target_os = "macos")) {
+            base_dirs.data_dir().join("ZcashParams")
+        } else {
+            base_dirs.home_dir().join(".zcash-params")
+        }
+    })
+}
+
 pub fn load_parameters(
     spend_path: &Path,
     output_path: &Path,
diff --git a/zcash_proofs/src/prover.rs b/zcash_proofs/src/prover.rs
index 3dd665a7d..d1c23aac7 100644
--- a/zcash_proofs/src/prover.rs
+++ b/zcash_proofs/src/prover.rs
@@ -1,7 +1,6 @@
 //! Abstractions over the proving system and parameters for ease of use.
 
 use bellman::groth16::{Parameters, PreparedVerifyingKey};
-use directories::BaseDirs;
 use pairing::bls12_381::{Bls12, Fr};
 use std::path::Path;
 use zcash_primitives::{
@@ -17,7 +16,10 @@ use zcash_primitives::{
     JUBJUB,
 };
 
-use crate::{load_parameters, sapling::SaplingProvingContext};
+use crate::{
+    default_params_folder, load_parameters, sapling::SaplingProvingContext, SAPLING_OUTPUT_NAME,
+    SAPLING_SPEND_NAME,
+};
 
 /// An implementation of [`TxProver`] using Sapling Spend and Output parameters from
 /// locally-accessible paths.
@@ -78,18 +80,11 @@ impl LocalTxProver {
     /// This function will panic if the parameters in the default local location do not
     /// have the expected hashes.
     pub fn with_default_location() -> Option<Self> {
-        let base_dirs = BaseDirs::new()?;
-        let unix_params_dir = base_dirs.home_dir().join(".zcash-params");
-        let win_osx_params_dir = base_dirs.data_dir().join("ZcashParams");
-        let (spend_path, output_path) = if unix_params_dir.exists() {
+        let params_dir = default_params_folder()?;
+        let (spend_path, output_path) = if params_dir.exists() {
             (
-                unix_params_dir.join("sapling-spend.params"),
-                unix_params_dir.join("sapling-output.params"),
-            )
-        } else if win_osx_params_dir.exists() {
-            (
-                win_osx_params_dir.join("sapling-spend.params"),
-                win_osx_params_dir.join("sapling-output.params"),
+                params_dir.join(SAPLING_SPEND_NAME),
+                params_dir.join(SAPLING_OUTPUT_NAME),
             )
         } else {
             return None;