diff --git a/programs/fileio.c b/programs/fileio.c
index 5688d43b9..866227af3 100644
--- a/programs/fileio.c
+++ b/programs/fileio.c
@@ -588,7 +588,7 @@ int FIO_rust_decompressLz4Frame(
 
 void FIO_rust_displayCompressionParameters(const FIO_prefs_t* prefs);
 #ifdef ZSTD_LZ4COMPRESS
-int FIO_rust_LZ4_GetBlockSize_FromBlockId(int id);
+int FIO_LZ4_GetBlockSize_FromBlockId(int id);
 #endif
 
 
@@ -2228,11 +2228,6 @@ FIO_compressLzmaFrame(cRess_t* ress,
 #define LZ4F_max64KB max64KB
 #endif
 
-static int FIO_LZ4_GetBlockSize_FromBlockId (int id)
-{
-    return FIO_rust_LZ4_GetBlockSize_FromBlockId(id);
-}
-
 typedef struct {
     LZ4F_compressionContext_t ctx;
     LZ4F_preferences_t prefs;
diff --git a/rust/src/fileio_prefs.rs b/rust/src/fileio_prefs.rs
index 4f5bafd2e..b7b79ad70 100644
--- a/rust/src/fileio_prefs.rs
+++ b/rust/src/fileio_prefs.rs
@@ -2012,7 +2012,7 @@ fn lz4_block_size_from_block_id(id: c_int) -> c_int {
 }
 
 #[no_mangle]
-pub extern "C" fn FIO_rust_LZ4_GetBlockSize_FromBlockId(id: c_int) -> c_int {
+pub extern "C" fn FIO_LZ4_GetBlockSize_FromBlockId(id: c_int) -> c_int {
     lz4_block_size_from_block_id(id)
 }
 
@@ -3678,11 +3678,11 @@ mod tests {
     }
 
     #[test]
-    fn lz4_block_size_shim_preserves_the_block_id_formula() {
-        assert_eq!(FIO_rust_LZ4_GetBlockSize_FromBlockId(0), 1 << 8);
-        assert_eq!(FIO_rust_LZ4_GetBlockSize_FromBlockId(1), 1 << 10);
-        assert_eq!(FIO_rust_LZ4_GetBlockSize_FromBlockId(3), 1 << 14);
-        assert_eq!(FIO_rust_LZ4_GetBlockSize_FromBlockId(4), 1 << 16);
+    fn lz4_block_size_policy_preserves_block_id_boundaries() {
+        assert_eq!(FIO_LZ4_GetBlockSize_FromBlockId(0), 1 << 8);
+        assert_eq!(FIO_LZ4_GetBlockSize_FromBlockId(1), 1 << 10);
+        assert_eq!(FIO_LZ4_GetBlockSize_FromBlockId(3), 1 << 14);
+        assert_eq!(FIO_LZ4_GetBlockSize_FromBlockId(4), 1 << 16);
     }
 
     #[test]