diff --git a/src/corelib/global/qtypes.h b/src/corelib/global/qtypes.h
index 705de1a0883..db9ba38e4cf 100644
--- a/src/corelib/global/qtypes.h
+++ b/src/corelib/global/qtypes.h
@@ -77,12 +77,12 @@ __extension__ typedef __uint128_t quint128;
 #  ifdef __cplusplus /* need to avoid c-style-casts in C++ mode */
 #    define QT_C_STYLE_CAST(type, x) static_cast<type>(x)
 #  else /* but C doesn't have constructor-style casts */
-#    define QT_C_STYLE_CAST(type, x) ((type)x)
+#    define QT_C_STYLE_CAST(type, x) ((type)(x))
 #  endif
 #  ifndef Q_UINT128_MAX /* allow qcompilerdetection.h/user override */
 #    define Q_UINT128_MAX QT_C_STYLE_CAST(quint128, -1)
 #  endif
-#  define Q_INT128_MAX QT_C_STYLE_CAST(qint128, (Q_UINT128_MAX / 2))
+#  define Q_INT128_MAX QT_C_STYLE_CAST(qint128, Q_UINT128_MAX / 2)
 #  define Q_INT128_MIN (-Q_INT128_MAX - 1)
 
 #  ifdef __cplusplus