diff --git a/core/tauri/src/manager.rs b/core/tauri/src/manager.rs
index 3e098bce3..6aaec208d 100644
--- a/core/tauri/src/manager.rs
+++ b/core/tauri/src/manager.rs
@@ -193,7 +193,12 @@ fn replace_csp_nonce(
 ) {
   let mut nonces = Vec::new();
   *asset = replace_with_callback(asset, token, || {
+    #[cfg(target_pointer_width = "64")]
     let mut raw = [0u8; 8];
+    #[cfg(target_pointer_width = "32")]
+    let mut raw = [0u8; 4];
+    #[cfg(target_pointer_width = "16")]
+    let mut raw = [0u8; 2];
     getrandom::getrandom(&mut raw).expect("failed to get random bytes");
     let nonce = usize::from_ne_bytes(raw);
     nonces.push(nonce);