diff --git a/Foundation/include/Poco/String.h b/Foundation/include/Poco/String.h
index cac900abe..33af062ea 100644
--- a/Foundation/include/Poco/String.h
+++ b/Foundation/include/Poco/String.h
@@ -23,7 +23,6 @@
 #include "Poco/Foundation.h"
 #include "Poco/Ascii.h"
 #include <cstring>
-#include <locale>
 #include <algorithm>