diff --git a/geoarray/baseclasses.py b/geoarray/baseclasses.py
index 2d11c3bf4d0270efa32ab0f651c82ee3fb043417..9b6e369ff06c58e87faa32986faec2e11047d070 100644
--- a/geoarray/baseclasses.py
+++ b/geoarray/baseclasses.py
@@ -1064,7 +1064,7 @@ class GeoArray(object):
             image2plot = image2plot.astype(np.int32)
 
         # rotated images always have to be resampled for plotting
-        if not ignore_rotation and gt[2] or gt[4]:
+        if not ignore_rotation and (gt[2] or gt[4]):
             out_prj = out_prj or self.projection
 
         if res_factor != 1. and image2plot.shape[0] * image2plot.shape[1] > 1e6:  # shape > 1000*1000