diff --git a/include/fast_float/float_common.h b/include/fast_float/float_common.h
index edcda12..daf770c 100644
--- a/include/fast_float/float_common.h
+++ b/include/fast_float/float_common.h
@@ -56,7 +56,6 @@ enum class chars_format : uint64_t {
   fortran = uint64_t(detail::basic_fortran_fmt) | general,
   allow_leading_plus = 1 << 7,
   skip_white_space = 1 << 8,
-  disallow_leading_sign = 1 << 9,
 #endif
 };
 
diff --git a/include/fast_float/parse_number.h b/include/fast_float/parse_number.h
index e165d17..0863d00 100644
--- a/include/fast_float/parse_number.h
+++ b/include/fast_float/parse_number.h
@@ -28,19 +28,13 @@ from_chars_result_t<UC>
   answer.ptr = first;
   answer.ec = std::errc(); // be optimistic
   [[assume(first < last)]]; // so dereference without checks
-  
-  bool minusSign;
-  if (!uint64_t(fmt & chars_format::disallow_leading_sign)) {
-    // C++17 20.19.3.(7.1) explicitly forbids '+' sign here
-    minusSign = (*first == UC('-'));
-    // C++17 20.19.3.(7.1) explicitly forbids '+' sign here
-    if ((*first == UC('-')) ||
-        (uint64_t(fmt & chars_format::allow_leading_plus) &&
-         (*first == UC('+')))) {
-      ++first;
-    }
-  } else {
-    minusSign = false;
+
+  bool const minusSign = (*first == UC('-'));
+  // C++17 20.19.3.(7.1) explicitly forbids '+' sign here
+  if ((*first == UC('-')) ||
+      (uint64_t(fmt & chars_format::allow_leading_plus) &&
+       (*first == UC('+')))) {
+    ++first;
   }
 
   if (last - first >= 3) {