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-rw-r--r--src/audioinputenginemidi.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/audioinputenginemidi.cc b/src/audioinputenginemidi.cc
index e3cb796..e18e446 100644
--- a/src/audioinputenginemidi.cc
+++ b/src/audioinputenginemidi.cc
@@ -38,7 +38,7 @@ AudioInputEngineMidi::AudioInputEngineMidi()
is_valid = false;
}
-bool AudioInputEngineMidi::loadMidiMap(std::string file, Instruments &instruments)
+bool AudioInputEngineMidi::loadMidiMap(const std::string& file, const Instruments& instruments)
{
std::string f = file;