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-rw-r--r--include/tinyalsa/interval.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/tinyalsa/interval.h b/include/tinyalsa/interval.h
index 3f6f3dc..068571d 100644
--- a/include/tinyalsa/interval.h
+++ b/include/tinyalsa/interval.h
@@ -30,6 +30,7 @@
#define TINYALSA_INTERVAL_H
#include <stdlib.h>
+#include <unistd.h>
/** A closed range signed interval. */