diff --git a/tests/exhaustive32_midpoint.cpp b/tests/exhaustive32_midpoint.cpp
index 377d456..f473577 100644
--- a/tests/exhaustive32_midpoint.cpp
+++ b/tests/exhaustive32_midpoint.cpp
@@ -32,7 +32,7 @@ template <typename T> char *to_string(T d, char *buffer) {
 void strtod_from_string(const char * st, float& d) {
     char *pr = (char *)st;
 #if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) 
-    d = cygwin_strtod_l(st, &pr,  c_locale);
+    d = cygwin_strtod_l(st, &pr);
 #elif defined(_WIN32)
     static _locale_t c_locale = _create_locale(LC_ALL, "C");
     d = _strtof_l(st, &pr,  c_locale);
diff --git a/tests/random_string.cpp b/tests/random_string.cpp
index 88a8673..f5a8d51 100644
--- a/tests/random_string.cpp
+++ b/tests/random_string.cpp
@@ -123,7 +123,7 @@ std::pair<float, bool> strtof_from_string(char *st) {
   float d;
   char *pr;
 #if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) 
-    d = cygwin_strtod_l(st, &pr,  c_locale);
+    d = cygwin_strtod_l(st, &pr);
 #elif defined(_WIN32)
   static _locale_t c_locale = _create_locale(LC_ALL, "C");
   d = _strtof_l(st, &pr, c_locale);
diff --git a/tests/string_test.cpp b/tests/string_test.cpp
index 3686def..22e16fe 100644
--- a/tests/string_test.cpp
+++ b/tests/string_test.cpp
@@ -86,7 +86,7 @@ template <>
 void strtod_from_string(const std::string &st, float& d) {
     char *pr = (char *)st.data();
 #if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) 
-    d = cygwin_strtod_l(st, &pr,  c_locale);
+    d = cygwin_strtod_l(st, &pr);
 #elif defined(_WIN32)
     static _locale_t c_locale = _create_locale(LC_ALL, "C");
     d = _strtof_l(st.data(), &pr,  c_locale);