diff --git a/tools/Python/mcplot/pyqtgraph/plotfuncs.py b/tools/Python/mcplot/pyqtgraph/plotfuncs.py
index 42ed68681..10afc0b6c 100644
--- a/tools/Python/mcplot/pyqtgraph/plotfuncs.py
+++ b/tools/Python/mcplot/pyqtgraph/plotfuncs.py
@@ -202,7 +202,7 @@ def plot_Data2D(data, plt, log=False, legend=True, icolormap=0, verbose=False, f
             ymin = np.min(idx)/10
             if ymin <= 0:
                 ymin=100*sys.float_info.min # Small, finite value.
-                dataset[dataset<=0] = ymin
+            dataset[dataset<=0] = ymin
             dataset = np.reshape(dataset, datashape)
             dataset = np.log10(dataset)
         else: