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-rw-r--r--src/corelib/global/qcompilerdetection.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h
index ad881ef4c9..01b3a298af 100644
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@@ -1053,7 +1053,8 @@
# define Q_DECL_NOTHROW Q_DECL_NOEXCEPT
#endif
-#if defined(Q_COMPILER_ALIGNOF) && !defined(Q_ALIGNOF)
+#if defined(Q_COMPILER_ALIGNOF)
+# undef Q_ALIGNOF
# define Q_ALIGNOF(x) alignof(x)
#endif