diff --git a/src/corelib/text/qlocale.cpp b/src/corelib/text/qlocale.cpp
index 811df6dcdce..d88c53cf004 100644
--- a/src/corelib/text/qlocale.cpp
+++ b/src/corelib/text/qlocale.cpp
@@ -69,6 +69,20 @@ Q_GLOBAL_STATIC(QSystemLocaleSingleton, QSystemLocale_globalSystemLocale)
 Q_CONSTINIT static QLocaleData systemLocaleData = {};
 #endif
 
+static_assert(ascii_isspace(' '));
+static_assert(ascii_isspace('\t'));
+static_assert(ascii_isspace('\n'));
+static_assert(ascii_isspace('\v'));
+static_assert(ascii_isspace('\f'));
+static_assert(ascii_isspace('\r'));
+static_assert(!ascii_isspace('\0'));
+static_assert(!ascii_isspace('\a'));
+static_assert(!ascii_isspace('a'));
+static_assert(!ascii_isspace('\177'));
+static_assert(!ascii_isspace(uchar('\200')));
+static_assert(!ascii_isspace(uchar('\xA0')));
+static_assert(!ascii_isspace(uchar('\377')));
+
 /******************************************************************************
 ** Helpers for accessing Qt locale database
 */
diff --git a/src/corelib/text/qlocale_p.h b/src/corelib/text/qlocale_p.h
index 4df44f4cd48..2ec779bff69 100644
--- a/src/corelib/text/qlocale_p.h
+++ b/src/corelib/text/qlocale_p.h
@@ -492,20 +492,6 @@ enum { AsciiSpaceMask = (1u << (' ' - 1)) |
     return c >= 1u && c <= 32u && (AsciiSpaceMask >> uint(c - 1)) & 1u;
 }
 
-static_assert(ascii_isspace(' '));
-static_assert(ascii_isspace('\t'));
-static_assert(ascii_isspace('\n'));
-static_assert(ascii_isspace('\v'));
-static_assert(ascii_isspace('\f'));
-static_assert(ascii_isspace('\r'));
-static_assert(!ascii_isspace('\0'));
-static_assert(!ascii_isspace('\a'));
-static_assert(!ascii_isspace('a'));
-static_assert(!ascii_isspace('\177'));
-static_assert(!ascii_isspace(uchar('\200')));
-static_assert(!ascii_isspace(uchar('\xA0')));
-static_assert(!ascii_isspace(uchar('\377')));
-
 QT_END_NAMESPACE
 
 // ### move to qstringview.h