diff --git a/source/basic.tex b/source/basic.tex
index 9524265f81..bd670465a5 100644
--- a/source/basic.tex
+++ b/source/basic.tex
@@ -6169,9 +6169,13 @@
 \end{note}
 
 \pnum
-Two expression evaluations \defn{conflict} if one of them modifies a memory
+Two expression evaluations \defn{conflict} if one of them modifies\iref{defns.access} a memory
 location\iref{intro.memory} and the other one reads or modifies the same
 memory location.
+\begin{note}
+A modification can still conflict
+even if it does not alter the value of any bits.
+\end{note}
 
 \pnum
 The library defines a number of atomic operations\iref{atomics} and