1 files changed, 2 insertions, 0 deletions
diff --git a/cpp/src/IceUtil/StringUtil.cpp b/cpp/src/IceUtil/StringUtil.cpp
index b0311e37b53..a232d85dfac 100644
--- a/cpp/src/IceUtil/StringUtil.cpp
+++ b/cpp/src/IceUtil/StringUtil.cpp
@@ -128,6 +128,8 @@ IceUtil::unescapeString(const string& s, string::size_type start, string::size_t
     assert(end <= s.size());
     assert(start <= end);
 
+    result.reserve(end - start);
+
     while(start < end)
     {
         char ch = s[start];