diff --git a/lib/app_ipc.h b/lib/app_ipc.h
index e37e41d1c4..715fda865e 100755
--- a/lib/app_ipc.h
+++ b/lib/app_ipc.h
@@ -236,5 +236,7 @@ int parse_graphics_file(FILE* f, GRAPHICS_INFO* gi);
 extern const char* xml_graphics_modes[NGRAPHICS_MSGS];
 extern int boinc_link(const char* phys_name, const char* logical_name);
 extern int boinc_resolve_filename(const char*, char*, int len);
+extern int boinc_resolve_filename_s(const char*, std::string&);
 
 #endif
+