diff --git a/src/libslic3r/LocalesUtils.cpp b/src/libslic3r/LocalesUtils.cpp
index 8f4d26642..64ab700ed 100644
--- a/src/libslic3r/LocalesUtils.cpp
+++ b/src/libslic3r/LocalesUtils.cpp
@@ -19,6 +19,7 @@ CNumericLocalesSetter::CNumericLocalesSetter()
 #else // APPLE
     m_original_locale = uselocale((locale_t)0);
     m_new_locale = newlocale(LC_NUMERIC_MASK, "C", m_original_locale);
+    uselocale(m_new_locale);
 #endif
 }