diff --git a/Cargo.lock b/Cargo.lock
index df805ff..186829a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -280,7 +280,7 @@ dependencies = [
 
 [[package]]
 name = "finch"
-version = "0.4.3"
+version = "0.5.0"
 dependencies = [
  "bincode",
  "capnp",
diff --git a/lib/src/sketch_schemes/mash.rs b/lib/src/sketch_schemes/mash.rs
index 94667ce..24d169d 100644
--- a/lib/src/sketch_schemes/mash.rs
+++ b/lib/src/sketch_schemes/mash.rs
@@ -67,10 +67,10 @@ impl MashSketcher {
 
 impl SketchScheme for MashSketcher {
     fn process(&mut self, seq: &SequenceRecord) {
-        self.total_bases += seq.sequence().len() as u64;
-        let rc = seq.reverse_complement();
-        for (_, kmer, is_rev_complement) in
-            seq.normalize(false).canonical_kmers(self.kmer_length, &rc)
+        let norm_seq = seq.normalize(false);
+        self.total_bases += norm_seq.sequence().len() as u64;
+        let rc = norm_seq.reverse_complement();
+        for (_, kmer, is_rev_complement) in norm_seq.canonical_kmers(self.kmer_length, &rc)
         {
             let rc_count = u8::from(is_rev_complement);
             self.push(kmer, rc_count);
diff --git a/lib/src/sketch_schemes/scaled.rs b/lib/src/sketch_schemes/scaled.rs
index c835437..9313009 100644
--- a/lib/src/sketch_schemes/scaled.rs
+++ b/lib/src/sketch_schemes/scaled.rs
@@ -65,10 +65,10 @@ impl ScaledSketcher {
 
 impl SketchScheme for ScaledSketcher {
     fn process(&mut self, seq: &SequenceRecord) {
-        self.total_bases += seq.sequence().len() as u64;
-        let rc = seq.reverse_complement();
-        for (_, kmer, is_rev_complement) in
-            seq.normalize(false).canonical_kmers(self.kmer_length, &rc)
+        let norm_seq = seq.normalize(false);
+        self.total_bases += norm_seq.sequence().len() as u64;
+        let rc = norm_seq.reverse_complement();
+        for (_, kmer, is_rev_complement) in norm_seq.canonical_kmers(self.kmer_length, &rc)
         {
             let rc_count = u8::from(is_rev_complement);
             self.push(kmer, rc_count);