1 files changed, 1 insertions, 1 deletions
diff --git a/gfx/src/nsSize.h b/gfx/src/nsSize.h
index f27c478f96..bb1505a2c2 100644
--- a/gfx/src/nsSize.h
+++ b/gfx/src/nsSize.h
@@ -30,7 +30,7 @@ struct nsSize : public mozilla::gfx::BaseSize<nscoord, nsSize> {
    * @param aFromAPP the APP to scale from
    * @param aToAPP the APP to scale to
    */
-  MOZ_MUST_USE inline nsSize
+  [[nodiscard]] inline nsSize
     ScaleToOtherAppUnits(int32_t aFromAPP, int32_t aToAPP) const;
 };