diff --git a/clang/lib/Analysis/FlowSensitive/WatchedLiteralsSolver.cpp b/clang/lib/Analysis/FlowSensitive/WatchedLiteralsSolver.cpp
index 05ae36ddbc898e..ab3a8104e31717 100644
--- a/clang/lib/Analysis/FlowSensitive/WatchedLiteralsSolver.cpp
+++ b/clang/lib/Analysis/FlowSensitive/WatchedLiteralsSolver.cpp
@@ -59,7 +59,7 @@ using Literal = uint32_t;
 
 /// A null literal is used as a placeholder in various data structures and
 /// algorithms.
-static constexpr Literal NullLit = 0;
+[[maybe_unused]] static constexpr Literal NullLit = 0;
 
 /// Returns the positive literal `V`.
 static constexpr Literal posLit(Variable V) { return 2 * V; }