diff --git a/lib/matplotlib/ticker.py b/lib/matplotlib/ticker.py
index 93dc6c885917..bc4a7b6b95d7 100644
--- a/lib/matplotlib/ticker.py
+++ b/lib/matplotlib/ticker.py
@@ -2155,7 +2155,7 @@ def tick_values(self, vmin, vmax):
                 stride += 1
 
         # Does subs include anything other than 1?
-        have_subs = len(subs) > 1 or (len(subs == 1) and subs[0] != 1.0)
+        have_subs = len(subs) > 1 or (len(subs) == 1 and subs[0] != 1.0)
 
         decades = np.arange(math.floor(vmin) - stride,
                             math.ceil(vmax) + 2 * stride, stride)