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-rw-r--r--libs/ardour/session.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index ead2e97f75..8d13570689 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -4488,7 +4488,7 @@ Session::count_sources_by_origin (const string& path)
uint32_t cnt = 0;
Glib::Threads::Mutex::Lock lm (source_lock);
- for (SourceMap::iterator i = sources.begin(); i != sources.end(); ++i) {
+ for (SourceMap::const_iterator i = sources.begin(); i != sources.end(); ++i) {
boost::shared_ptr<FileSource> fs
= boost::dynamic_pointer_cast<FileSource>(i->second);