diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h
index 8ef8b79902..fa8a529d0c 100644
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@@ -903,6 +903,11 @@
 #    undef Q_COMPILER_UNICODE_STRINGS
 #    undef Q_COMPILER_NOEXCEPT
 #  endif
+#  if defined(_HAS_DINKUM_CLIB) && !defined(_HAS_CONSTEXPR)
+// The libcpp is missing constexpr keywords on important functions like std::numeric_limits<>::min()
+// Disable constexpr support on QNX even if the compiler supports it
+#    undef Q_COMPILER_CONSTEXPR
+#  endif
 # endif // Q_OS_QNX
 # if (defined(Q_CC_CLANG) || defined(Q_CC_INTEL)) && defined(Q_OS_MAC) && defined(__GNUC_LIBSTD__) \
     && ((__GNUC_LIBSTD__-0) * 100 + __GNUC_LIBSTD_MINOR__-0 <= 402)