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-rw-r--r--gr-digital/lib/digital_constellation.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/gr-digital/lib/digital_constellation.cc b/gr-digital/lib/digital_constellation.cc
index 3dfc70273..0c100f38e 100644
--- a/gr-digital/lib/digital_constellation.cc
+++ b/gr-digital/lib/digital_constellation.cc
@@ -20,6 +20,10 @@
* Boston, MA 02110-1301, USA.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <gr_io_signature.h>
#include <digital_constellation.h>
#include <digital_metric_type.h>