diff --git a/svf/include/AE/Core/AddressValue.h b/svf/include/AE/Core/AddressValue.h
index dae9c3417..3fb4ab49c 100644
--- a/svf/include/AE/Core/AddressValue.h
+++ b/svf/include/AE/Core/AddressValue.h
@@ -212,7 +212,7 @@ class AddressValue
     static inline u32_t getVirtualMemAddress(u32_t idx)
     {
         // 0 is the null address, should not be used as a virtual address
-        assert(idx != 0 && "because 0 represents null pointer");
+        assert(idx != 0 && "idx can’t be 0 because it represents a nullptr");
         return AddressMask + idx;
     }