diff --git a/src/libslic3r/LocalesUtils.cpp b/src/libslic3r/LocalesUtils.cpp
index 116078a25..cb118f99c 100644
--- a/src/libslic3r/LocalesUtils.cpp
+++ b/src/libslic3r/LocalesUtils.cpp
@@ -24,7 +24,7 @@ CNumericLocalesSetter::CNumericLocalesSetter()
 CNumericLocalesSetter::~CNumericLocalesSetter()
 {
 #ifdef _WIN32
-    std::setlocale(LC_NUMERIC, m_orig_numeric_locale)
+    std::setlocale(LC_NUMERIC, m_orig_numeric_locale.data());
 #else
     uselocale(m_original_locale);
     freelocale(m_new_locale);
diff --git a/tests/libslic3r/test_config.cpp b/tests/libslic3r/test_config.cpp
index c3f17def2..417a29dca 100644
--- a/tests/libslic3r/test_config.cpp
+++ b/tests/libslic3r/test_config.cpp
@@ -1,6 +1,7 @@
 #include <catch2/catch.hpp>
 
 #include "libslic3r/PrintConfig.hpp"
+#include "libslic3r/LocalesUtils.hpp"
 
 using namespace Slic3r;
 
@@ -112,7 +113,7 @@ SCENARIO("Config accessor functions perform as expected.", "[Config]") {
         WHEN("A string option is set through the double interface") {
             config.set("end_gcode", 100.5);
             THEN("The underlying value is set correctly.") {
-                REQUIRE(config.opt<ConfigOptionString>("end_gcode")->value == std::to_string(100.5));
+                REQUIRE(config.opt<ConfigOptionString>("end_gcode")->value == float_to_string_decimal_point(100.5));
             }
         }
         WHEN("A float or percent is set as a percent through the string interface.") {