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-rw-r--r--gr-qtgui/include/qtgui/const_sink_c.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/gr-qtgui/include/qtgui/const_sink_c.h b/gr-qtgui/include/qtgui/const_sink_c.h
index e0c358bcad..b81c53295f 100644
--- a/gr-qtgui/include/qtgui/const_sink_c.h
+++ b/gr-qtgui/include/qtgui/const_sink_c.h
@@ -28,6 +28,7 @@
#include <gr_sync_block.h>
#include <qapplication.h>
#include <filter/firdes.h>
+
namespace gr {
namespace qtgui {