diff --git a/include/utils/BitSet.h b/include/utils/BitSet.h
index de748b5..600017e 100644
--- a/include/utils/BitSet.h
+++ b/include/utils/BitSet.h
@@ -44,6 +44,9 @@
     // Returns true if the bit set does not contain any marked bits.
     inline bool isEmpty() const { return ! value; }
 
+    // Returns true if the bit set does not contain any unmarked bits.
+    inline bool isFull() const { return value == 0xffffffff; }
+
     // Returns true if the specified bit is marked.
     inline bool hasBit(uint32_t n) const { return value & valueForBit(n); }