diff --git a/src/structs/lepton_decoder.rs b/src/structs/lepton_decoder.rs
index 4a25a614..99d86e03 100644
--- a/src/structs/lepton_decoder.rs
+++ b/src/structs/lepton_decoder.rs
@@ -475,7 +475,7 @@ fn decode_edge<R: Read, const ALL_PRESENT: bool>(
     decode_one_edge::<R, ALL_PRESENT, true>(
         model_per_color,
         bool_reader,
-        &curr_horiz_pred.to_array(),
+        &curr_horiz_pred,
         here_mut,
         qt,
         pt,
@@ -486,7 +486,7 @@ fn decode_edge<R: Read, const ALL_PRESENT: bool>(
     decode_one_edge::<R, ALL_PRESENT, false>(
         model_per_color,
         bool_reader,
-        &curr_vert_pred.to_array(),
+        &curr_vert_pred,
         here_mut,
         qt,
         pt,
@@ -504,7 +504,7 @@ fn decode_edge<R: Read, const ALL_PRESENT: bool>(
 fn decode_one_edge<R: Read, const ALL_PRESENT: bool, const HORIZONTAL: bool>(
     model_per_color: &mut ModelPerColor,
     bool_reader: &mut VPXBoolReader<R>,
-    pred: &[i32; 8],
+    pred: &i32x8,
     here_mut: &mut AlignedBlock,
     qt: &QuantizationTables,
     pt: &ProbabilityTables,
@@ -529,7 +529,7 @@ fn decode_one_edge<R: Read, const ALL_PRESENT: bool, const HORIZONTAL: bool>(
 
     let mut coord_tr = delta;
 
-    for lane in 0..7 {
+    for lane in 1..8 {
         if num_non_zeros_edge == 0 {
             break;
         }
diff --git a/src/structs/lepton_encoder.rs b/src/structs/lepton_encoder.rs
index 5ef16e46..2f7fa476 100644
--- a/src/structs/lepton_encoder.rs
+++ b/src/structs/lepton_encoder.rs
@@ -500,7 +500,7 @@ fn encode_edge<W: Write, const ALL_PRESENT: bool>(
         here_tr,
         model_per_color,
         bool_writer,
-        &curr_horiz_pred.to_array(),
+        &curr_horiz_pred,
         qt,
         pt,
         num_non_zeros_bin,
@@ -512,7 +512,7 @@ fn encode_edge<W: Write, const ALL_PRESENT: bool>(
         here_tr,
         model_per_color,
         bool_writer,
-        &curr_vert_pred.to_array(),
+        &curr_vert_pred,
         qt,
         pt,
         num_non_zeros_bin,
@@ -538,7 +538,7 @@ fn encode_one_edge<W: Write, const ALL_PRESENT: bool, const HORIZONTAL: bool>(
     block: &AlignedBlock,
     model_per_color: &mut ModelPerColor,
     bool_writer: &mut VPXBoolWriter<W>,
-    pred: &[i32; 8],
+    pred: &i32x8,
     qt: &QuantizationTables,
     pt: &ProbabilityTables,
     num_non_zeros_bin: u8,
@@ -586,7 +586,7 @@ fn encode_one_edge<W: Write, const ALL_PRESENT: bool, const HORIZONTAL: bool>(
 
     let mut coord_tr = delta;
 
-    for lane in 0..7 {
+    for lane in 1..8 {
         if num_non_zeros_edge == 0 {
             break;
         }
diff --git a/src/structs/probability_tables.rs b/src/structs/probability_tables.rs
index 9bd50534..db1ee8b7 100644
--- a/src/structs/probability_tables.rs
+++ b/src/structs/probability_tables.rs
@@ -209,7 +209,7 @@ impl ProbabilityTables {
         &self,
         qt: &QuantizationTables,
         lane: usize,
-        pred: &[i32; 8],
+        pred: &i32x8,
     ) -> i32 {
         if !ALL_PRESENT
             && ((HORIZONTAL && !self.above_present) || (!HORIZONTAL && !self.left_present))
@@ -217,7 +217,7 @@ impl ProbabilityTables {
             return 0;
         }
 
-        pred[lane + 1] / qt.get_quantization_table_divisors::<HORIZONTAL>()[lane + 1].get()
+        pred.as_array_ref()[lane] / qt.get_quantization_table_divisors::<HORIZONTAL>()[lane].get()
     }
 
     pub fn adv_predict_dc_pix<const ALL_PRESENT: bool>(