diff --git a/src/corelib/global/qglobal.cpp b/src/corelib/global/qglobal.cpp
index ad17f41236..a1a27376e7 100644
--- a/src/corelib/global/qglobal.cpp
+++ b/src/corelib/global/qglobal.cpp
@@ -132,6 +132,9 @@ static_assert(QT_POINTER_SIZE == sizeof(void *), "QT_POINTER_SIZE defined incorr
 static_assert(sizeof(float) == 4, "Qt assumes that float is 32 bits");
 static_assert(sizeof(char16_t) == 2, "Qt assumes that char16_t is 16 bits");
 static_assert(sizeof(char32_t) == 4, "Qt assumes that char32_t is 32 bits");
+#if defined(Q_OS_WIN)
+static_assert(sizeof(wchar_t) == sizeof(char16_t));
+#endif
 static_assert(std::numeric_limits<int>::radix == 2,
                   "Qt assumes binary integers");
 static_assert((std::numeric_limits<int>::max() + std::numeric_limits<int>::lowest()) == -1,
diff --git a/src/corelib/text/qchar.h b/src/corelib/text/qchar.h
index f66671e27c..5325b9ca8d 100644
--- a/src/corelib/text/qchar.h
+++ b/src/corelib/text/qchar.h
@@ -116,9 +116,6 @@ public:
     constexpr Q_IMPLICIT QChar(SpecialCharacter s) noexcept : ucs(char16_t(s)) {} // implicit
     constexpr Q_IMPLICIT QChar(QLatin1Char ch) noexcept : ucs(ch.unicode()) {} // implicit
     constexpr Q_IMPLICIT QChar(char16_t ch) noexcept : ucs(ch) {} // implicit
-#if defined(Q_OS_WIN)
-    static_assert(sizeof(wchar_t) == sizeof(char16_t));
-#endif
 #if defined(Q_OS_WIN) || defined(Q_CLANG_QDOC)
     constexpr Q_IMPLICIT QChar(wchar_t ch) noexcept : ucs(char16_t(ch)) {} // implicit
 #endif