Index: dll/win32/browseui/CAutoComplete.cpp
===================================================================
--- dll/win32/browseui/CAutoComplete.cpp	(revision 73854)
+++ dll/win32/browseui/CAutoComplete.cpp	(working copy)
@@ -159,7 +159,7 @@
         WCHAR *value;
         HKEY hKey = 0;
         LONG res;
-        LONG len;
+        LONG len = MAX_PATH * 2;
 
         /* pwszRegKeyPath contains the key as well as the value, so we split */
         key = (WCHAR *)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, (wcslen(pwzsRegKeyPath) + 1) * sizeof(WCHAR));