diff --git a/src/octoprint/plugins/cura/__init__.py b/src/octoprint/plugins/cura/__init__.py
index 0fa18948..e0f47991 100644
--- a/src/octoprint/plugins/cura/__init__.py
+++ b/src/octoprint/plugins/cura/__init__.py
@@ -273,8 +273,8 @@ class CuraPlugin(octoprint.plugin.SlicerPlugin,
 					export=2
 				)
 				while p.returncode is None:
-					line = p.stderr.readline(timeout=0.5)
-					if not line:
+					line = p.stderr.readline()
+					if line is None:
 						if line_seen:
 							break
 						else: