diff --git a/src/decoder/mod.rs b/src/decoder/mod.rs
index fced943..07e6a47 100644
--- a/src/decoder/mod.rs
+++ b/src/decoder/mod.rs
@@ -283,11 +283,13 @@ fn rev_hpredict(image: DecodingBuffer, size: (u32, u32), color_type: ColorType)
         DecodingBuffer::U64(buf) => {
             rev_hpredict_nsamp(buf, size, samples)?;
         }
-        DecodingBuffer::F32(buf) => {
-            rev_hpredict_nsamp(buf, size, samples)?;
+        DecodingBuffer::F32(_buf) => {
+            unimplemented!()
+            // rev_hpredict_nsamp(buf, size, samples)?;
         }
-        DecodingBuffer::F64(buf) => {
-            rev_hpredict_nsamp(buf, size, samples)?;
+        DecodingBuffer::F64(_buf) => {
+            unimplemented!()
+            // rev_hpredict_nsamp(buf, size, samples)?;
         }
     }
     Ok(())