diff --git a/rqt_bag_plugins/src/rqt_bag_plugins/image_timeline_renderer.py b/rqt_bag_plugins/src/rqt_bag_plugins/image_timeline_renderer.py
index fb1c456d..cbbd9628 100755
--- a/rqt_bag_plugins/src/rqt_bag_plugins/image_timeline_renderer.py
+++ b/rqt_bag_plugins/src/rqt_bag_plugins/image_timeline_renderer.py
@@ -34,7 +34,7 @@
 
 # HACK workaround for upstream pillow issue python-pillow/Pillow#400
 import sys
-if sys.modules['PyQt5']:
+if 'PyQt5' in sys.modules:
     sys.modules['PyQt5'] = None
 from PIL import Image
 from PIL.ImageQt import ImageQt
diff --git a/rqt_bag_plugins/src/rqt_bag_plugins/image_view.py b/rqt_bag_plugins/src/rqt_bag_plugins/image_view.py
index 9b1ae64f..e056abb9 100755
--- a/rqt_bag_plugins/src/rqt_bag_plugins/image_view.py
+++ b/rqt_bag_plugins/src/rqt_bag_plugins/image_view.py
@@ -34,7 +34,7 @@
 
 # HACK workaround for upstream pillow issue python-pillow/Pillow#400
 import sys
-if sys.modules['PyQt5']:
+if 'PyQt5' in sys.modules:
     sys.modules['PyQt5'] = None
 from PIL.ImageQt import ImageQt