diff --git a/crates/effects/src/ocio/lut.rs b/crates/effects/src/ocio/lut.rs
index de931a411..e1fbf0ffe 100644
--- a/crates/effects/src/ocio/lut.rs
+++ b/crates/effects/src/ocio/lut.rs
@@ -284,7 +284,7 @@ pub fn load_file(src: &str) -> Option<Arc<FileXform>> {
         parse_file(src, "")
     } else {
         let ext = std::path::Path::new(src_t).extension().and_then(std::ffi::OsStr::to_str).unwrap_or("");
-        std::fs::read_to_string(src_t).ok().and_then(|t| parse_file(&t, ext))
+        crate::utility::read_text_file(std::path::Path::new(src_t)).ok().and_then(|t| parse_file(&t, ext))
     }
     .map(Arc::new);
     if let Ok(mut m) = cache.lock() {
diff --git a/crates/effects/src/utility.rs b/crates/effects/src/utility.rs
index 2098764f2..b93698c33 100644
--- a/crates/effects/src/utility.rs
+++ b/crates/effects/src/utility.rs
@@ -695,6 +695,8 @@ mod read_text_file_tests {
         assert!(std::process::Command::new("mkfifo").arg(&fifo).status().unwrap().success());
         // Opening a FIFO with no writer would block: this returns at once.
         assert!(super::read_text_file(&fifo).is_err());
+        // An OCIO FileTransform source reads through the same bounded reader.
+        assert!(crate::ocio::load_file(&fifo.to_string_lossy()).is_none());
         std::fs::remove_dir_all(&dir).unwrap();
     }
 }