diff --git a/src/corelib/text/qlocale_tools.cpp b/src/corelib/text/qlocale_tools.cpp
index cf111e9ecab..b3356662f22 100644
--- a/src/corelib/text/qlocale_tools.cpp
+++ b/src/corelib/text/qlocale_tools.cpp
@@ -301,9 +301,6 @@ QSimpleParsedNumber<double> qt_asciiToDouble(const char *num, qsizetype numLen,
     int conv_flags = double_conversion::StringToDoubleConverter::NO_FLAGS;
     if (strayCharMode == TrailingJunkAllowed) {
         conv_flags = double_conversion::StringToDoubleConverter::ALLOW_TRAILING_JUNK;
-    } else if (strayCharMode == WhitespacesAllowed) {
-        conv_flags = double_conversion::StringToDoubleConverter::ALLOW_LEADING_SPACES
-                | double_conversion::StringToDoubleConverter::ALLOW_TRAILING_SPACES;
     }
     double_conversion::StringToDoubleConverter conv(conv_flags, 0.0, qt_qnan(), nullptr, nullptr);
     if (int(numLen) != numLen) {
diff --git a/src/corelib/text/qlocale_tools_p.h b/src/corelib/text/qlocale_tools_p.h
index 5dd6a64073c..378d522035c 100644
--- a/src/corelib/text/qlocale_tools_p.h
+++ b/src/corelib/text/qlocale_tools_p.h
@@ -36,7 +36,6 @@ using qinternaluint128 = std::_Unsigned128;
 enum StrayCharacterMode {
     TrailingJunkProhibited,
     TrailingJunkAllowed,
-    WhitespacesAllowed
 };
 
 // API note: this function can't process a number with more than 2.1 billion digits