diff --git a/examples/sample2.rs b/examples/sample2.rs
index b754d81..5336d51 100644
--- a/examples/sample2.rs
+++ b/examples/sample2.rs
@@ -166,7 +166,7 @@ impl BytePacketBuffer {
     fn write_qname(&mut self, qname: &str) -> Result<()> {
         for label in qname.split('.') {
             let len = label.len();
-            if len > 0x34 {
+            if len > 0x3f {
                 return Err("Single label exceeds 63 characters of length".into());
             }
 
diff --git a/examples/sample3.rs b/examples/sample3.rs
index 32a3001..203cb2d 100644
--- a/examples/sample3.rs
+++ b/examples/sample3.rs
@@ -166,7 +166,7 @@ impl BytePacketBuffer {
     fn write_qname(&mut self, qname: &str) -> Result<()> {
         for label in qname.split('.') {
             let len = label.len();
-            if len > 0x34 {
+            if len > 0x3f {
                 return Err("Single label exceeds 63 characters of length".into());
             }
 
diff --git a/examples/sample4.rs b/examples/sample4.rs
index a648131..a1633ad 100644
--- a/examples/sample4.rs
+++ b/examples/sample4.rs
@@ -166,7 +166,7 @@ impl BytePacketBuffer {
     fn write_qname(&mut self, qname: &str) -> Result<()> {
         for label in qname.split('.') {
             let len = label.len();
-            if len > 0x34 {
+            if len > 0x3f {
                 return Err("Single label exceeds 63 characters of length".into());
             }
 
diff --git a/examples/sample5.rs b/examples/sample5.rs
index 40555c9..c2b47df 100644
--- a/examples/sample5.rs
+++ b/examples/sample5.rs
@@ -166,7 +166,7 @@ impl BytePacketBuffer {
     fn write_qname(&mut self, qname: &str) -> Result<()> {
         for label in qname.split('.') {
             let len = label.len();
-            if len > 0x34 {
+            if len > 0x3f {
                 return Err("Single label exceeds 63 characters of length".into());
             }