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-rw-r--r--gnuradio-core/src/lib/io/gr_file_source.cc1
1 files changed, 1 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/io/gr_file_source.cc b/gnuradio-core/src/lib/io/gr_file_source.cc
index f3def0721..6da7abac2 100644
--- a/gnuradio-core/src/lib/io/gr_file_source.cc
+++ b/gnuradio-core/src/lib/io/gr_file_source.cc
@@ -24,6 +24,7 @@
#include "config.h"
#endif
+#include <gruel/thread.h>
#include <gr_file_source.h>
#include <gr_io_signature.h>
#include <cstdio>