diff --git a/pandas/core/ops.py b/pandas/core/ops.py
index 96b447cda4bc4..7c5ad04cc90b0 100644
--- a/pandas/core/ops.py
+++ b/pandas/core/ops.py
@@ -1176,6 +1176,13 @@ def na_op(x, y):
                 yrav = y.ravel()
                 mask = notnull(xrav) & notnull(yrav)
                 xrav = xrav[mask]
+
+                # we may need to manually
+                # broadcast a 1 element array
+                if yrav.shape != mask.shape:
+                    yrav = np.empty(mask.shape, dtype=yrav.dtype)
+                    yrav.fill(yrav.item())
+
                 yrav = yrav[mask]
                 if np.prod(xrav.shape) and np.prod(yrav.shape):
                     with np.errstate(all='ignore'):