diff --git a/parsley/shared/src/main/scala/parsley/token/numeric/UnsignedInteger.scala b/parsley/shared/src/main/scala/parsley/token/numeric/UnsignedInteger.scala
index 39e75d92f..91c180cc8 100644
--- a/parsley/shared/src/main/scala/parsley/token/numeric/UnsignedInteger.scala
+++ b/parsley/shared/src/main/scala/parsley/token/numeric/UnsignedInteger.scala
@@ -20,6 +20,7 @@ private [token] final class UnsignedInteger(desc: NumericDesc, err: ErrorConfig,
     protected [numeric] override lazy val _hexadecimal: Parsley[BigInt] = atomic('0' *> noZeroHexadecimal)
     protected [numeric] override lazy val _octal: Parsley[BigInt] = atomic('0' *> noZeroOctal)
     protected [numeric] override lazy val _binary: Parsley[BigInt] = atomic('0' *> noZeroBinary)
+    // FIXME: numberEnd label is not applied here!
     protected [numeric] override lazy val _number: Parsley[BigInt] = {
         if (desc.decimalIntegersOnly) decimal
         else {