diff --git a/skimage/feature/censure.py b/skimage/feature/censure.py
index 6e403e49..774250bd 100644
--- a/skimage/feature/censure.py
+++ b/skimage/feature/censure.py
@@ -126,7 +126,7 @@ def _star_filter_kernel(m, n):
 def _suppress_lines(feature_mask, image, sigma, line_threshold):
     Axx, Axy, Ayy = _compute_auto_correlation(image, sigma)
     feature_mask[(Axx + Ayy) * (Axx + Ayy)
-                 > line_threshold * (Axx * Ayy - Axy * Axy)] = 0
+                 > line_threshold * (Axx * Ayy - Axy * Axy)] = False
     return feature_mask