diff --git a/chapter1.md b/chapter1.md
index 40796db..b96b1e0 100644
--- a/chapter1.md
+++ b/chapter1.md
@@ -431,7 +431,7 @@ impl BytePacketBuffer {
 
             // If len has the two most significant bit are set, it represents a jump to
             // some other offset in the packet:
-            if (len & 0xC0) > 0 {
+            if (len & 0xC0) == 0xC0 {
                 // Update the buffer position to a point past the current
                 // label. We don't need to touch it any further.
                 if !jumped {
diff --git a/samples/sample1.rs b/samples/sample1.rs
index e2943f1..ea982ad 100644
--- a/samples/sample1.rs
+++ b/samples/sample1.rs
@@ -87,7 +87,7 @@ impl BytePacketBuffer {
             // set, represents a offset relative to the start of the buffer. We
             // handle this by jumping to the offset, setting a flag to indicate
             // that we shouldn't update the shared buffer position once done.
-            if (len & 0xC0) > 0 {
+            if (len & 0xC0) == 0xC0 {
 
                 // When a jump is performed, we only modify the shared buffer
                 // position once, and avoid making the change later on.
diff --git a/samples/sample2.rs b/samples/sample2.rs
index 98442eb..d9afc50 100644
--- a/samples/sample2.rs
+++ b/samples/sample2.rs
@@ -87,7 +87,7 @@ impl BytePacketBuffer {
             // set, represents a offset relative to the start of the buffer. We
             // handle this by jumping to the offset, setting a flag to indicate
             // that we shouldn't update the shared buffer position once done.
-            if (len & 0xC0) > 0 {
+            if (len & 0xC0) == 0xC0 {
 
                 // When a jump is performed, we only modify the shared buffer
                 // position once, and avoid making the change later on.
diff --git a/samples/sample3.rs b/samples/sample3.rs
index 9bff2b1..d012fda 100644
--- a/samples/sample3.rs
+++ b/samples/sample3.rs
@@ -87,7 +87,7 @@ impl BytePacketBuffer {
             // set, represents a offset relative to the start of the buffer. We
             // handle this by jumping to the offset, setting a flag to indicate
             // that we shouldn't update the shared buffer position once done.
-            if (len & 0xC0) > 0 {
+            if (len & 0xC0) == 0xC0 {
 
                 // When a jump is performed, we only modify the shared buffer
                 // position once, and avoid making the change later on.
diff --git a/samples/sample4.rs b/samples/sample4.rs
index 900f736..d609c52 100644
--- a/samples/sample4.rs
+++ b/samples/sample4.rs
@@ -87,7 +87,7 @@ impl BytePacketBuffer {
             // set, represents a offset relative to the start of the buffer. We
             // handle this by jumping to the offset, setting a flag to indicate
             // that we shouldn't update the shared buffer position once done.
-            if (len & 0xC0) > 0 {
+            if (len & 0xC0) == 0xC0 {
 
                 // When a jump is performed, we only modify the shared buffer
                 // position once, and avoid making the change later on.
diff --git a/samples/sample5.rs b/samples/sample5.rs
index 94a254b..a53f0f1 100644
--- a/samples/sample5.rs
+++ b/samples/sample5.rs
@@ -87,7 +87,7 @@ impl BytePacketBuffer {
             // set, represents a offset relative to the start of the buffer. We
             // handle this by jumping to the offset, setting a flag to indicate
             // that we shouldn't update the shared buffer position once done.
-            if (len & 0xC0) > 0 {
+            if (len & 0xC0) == 0xC0 {
 
                 // When a jump is performed, we only modify the shared buffer
                 // position once, and avoid making the change later on.