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-rw-r--r--gr-qtgui/examples/pyqt_waterfall_c.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/gr-qtgui/examples/pyqt_waterfall_c.py b/gr-qtgui/examples/pyqt_waterfall_c.py
index 9d5ff333bb..0a24641b96 100644
--- a/gr-qtgui/examples/pyqt_waterfall_c.py
+++ b/gr-qtgui/examples/pyqt_waterfall_c.py
@@ -151,7 +151,7 @@ class my_top_block(gr.top_block):
filt = filter.fft_filter_ccc(1, taps)
self.snk1 = qtgui.waterfall_sink_c(npts, filter.firdes.WIN_BLACKMAN_hARRIS,
0, Rs,
- "Complex Waterfall Example", 2)
+ "Complex Waterfall Example", 2, None)
self.snk1.set_color_map(0, qtgui.INTENSITY_COLOR_MAP_TYPE_COOL)
self.snk1.set_color_map(1, qtgui.INTENSITY_COLOR_MAP_TYPE_COOL)