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-rw-r--r--gnuradio-core/src/lib/general/gri_control_loop.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/gnuradio-core/src/lib/general/gri_control_loop.cc b/gnuradio-core/src/lib/general/gri_control_loop.cc
index d84b47493..caad1f5f9 100644
--- a/gnuradio-core/src/lib/general/gri_control_loop.cc
+++ b/gnuradio-core/src/lib/general/gri_control_loop.cc
@@ -20,6 +20,10 @@
* Boston, MA 02110-1301, USA.
*/
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
#include <gri_control_loop.h>
#include <gr_math.h>
#include <stdexcept>