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-rw-r--r--gr-trellis/lib/fsm.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/gr-trellis/lib/fsm.cc b/gr-trellis/lib/fsm.cc
index 1bb6355899..e14a3fb08d 100644
--- a/gr-trellis/lib/fsm.cc
+++ b/gr-trellis/lib/fsm.cc
@@ -11,8 +11,8 @@
#include <gnuradio/logger.h>
#include <gnuradio/trellis/base.h>
#include <gnuradio/trellis/fsm.h>
-#include <stdlib.h>
#include <cmath>
+#include <cstdlib>
#include <fstream>
#include <stdexcept>
#include <string>