--- a/JavaScriptCore/wtf/unicode/icu/UnicodeIcu.h	
+++ a/JavaScriptCore/wtf/unicode/icu/UnicodeIcu.h	
@@ -27,6 +27,7 @@ 
 #include <unicode/uchar.h>
 #include <unicode/ustring.h>
 #include <unicode/utf16.h>
+#include <unicode/uversion.h>
 
 namespace WTF {
 namespace Unicode {
--- a/WebCore/platform/text/TextBreakIterator.h	
+++ a/WebCore/platform/text/TextBreakIterator.h	
@@ -26,7 +26,12 @@ 
 
 namespace WebCore {
 
+#if (U_ICU_VERSION_MAJOR_NUM == 4) && (U_ICU_VERSION_MINOR_NUM >= 4)
+    typedef struct UBreakIterator TextBreakIterator;
+#else
     class TextBreakIterator;
+#endif
+
 
     // Note: The returned iterator is good only until you get another iterator.