diff --git a/src/codegen/node_id.rs b/src/codegen/node_id.rs
index 0b82304..52982ac 100644
--- a/src/codegen/node_id.rs
+++ b/src/codegen/node_id.rs
@@ -22,15 +22,12 @@ impl Display for NodeID {
     fn fmt(&self, f: &mut Formatter) -> fmt::Result {
         let mut n = self.value;
         write!(f, "\"")?;
-        if n != 0 {
-            n -= 1;
-            if n == 0 {
-                f.write_char(CHARSET[0] as char)?;
-            } else {
-                while n > 0 {
-                    f.write_char(CHARSET[n % CHARSET.len()] as char)?;
-                    n /= CHARSET.len();
-                }
+        if n == 0 {
+            f.write_char(CHARSET[0] as char)?;
+        } else {
+            while n > 0 {
+                f.write_char(CHARSET[n % CHARSET.len()] as char)?;
+                n /= CHARSET.len();
             }
         }
         write!(f, "\"")