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-rw-r--r--sound/mididrv.cpp3
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/mididrv.cpp b/sound/mididrv.cpp
index 11c549b6af..0dc14f9558 100644
--- a/sound/mididrv.cpp
+++ b/sound/mididrv.cpp
@@ -386,7 +386,8 @@ int MidiDriver_SEQ::open(int mode) {
error("Cannot open /dev/null to dump midi output");
}
- _device_num = atoi(getenv("SCUMMVM_MIDIPORT"));
+ if (getenv("SCUMMVM_MIDIPORT"))
+ _device_num = atoi(getenv("SCUMMVM_MIDIPORT"));
return 0;
}