1 files changed, 5 insertions, 0 deletions
diff --git a/cpp/src/Slice/PHPUtil.cpp b/cpp/src/Slice/PHPUtil.cpp
index c47e9b00330..a2854f5a6e8 100644
--- a/cpp/src/Slice/PHPUtil.cpp
+++ b/cpp/src/Slice/PHPUtil.cpp
@@ -19,7 +19,12 @@ static string
 lowerCase(const string& s)
 {
     string result(s);
+#ifdef ICE_CPP11_COMPILER
+    transform(result.begin(), result.end(), result.begin(),
+              [](char c){ return static_cast<char>(::tolower(static_cast<unsigned char>(c))); });
+#else
     transform(result.begin(), result.end(), result.begin(), ::tolower);
+#endif
     return result;
 }