diff --git a/Kernel/VM/PhysicalRegion.h b/Kernel/VM/PhysicalRegion.h
index 769ca35f30..c6962768c8 100644
--- a/Kernel/VM/PhysicalRegion.h
+++ b/Kernel/VM/PhysicalRegion.h
@@ -30,7 +30,7 @@ public:
     PhysicalAddress lower() const { return m_lower; }
     PhysicalAddress upper() const { return m_upper; }
     unsigned size() const { return m_pages; }
-    bool contains(PhysicalAddress paddr) const { return paddr >= m_lower && paddr <= m_upper; }
+    bool contains(PhysicalAddress paddr) const { return paddr >= m_lower && paddr < m_upper; }
 
     OwnPtr<PhysicalRegion> try_take_pages_from_beginning(unsigned);