diff --git a/OpenHome/TestFramework/OptionParser.cpp b/OpenHome/TestFramework/OptionParser.cpp
index fe90233..644fc0b 100644
--- a/OpenHome/TestFramework/OptionParser.cpp
+++ b/OpenHome/TestFramework/OptionParser.cpp
@@ -282,6 +282,6 @@ void OptionParser::SetUsage(const TChar* aUsage)
 {
     delete iUsage;
     iUsage = NULL;
-    iUsage = new TChar[strlen(iUsage)];
+    iUsage = new TChar[strlen(aUsage)];
     (void)strcpy(iUsage, aUsage);
 }