diff --git a/klippy/extras/shaper_calibrate.py b/klippy/extras/shaper_calibrate.py
index db5c8e1ca..86b0b057a 100644
--- a/klippy/extras/shaper_calibrate.py
+++ b/klippy/extras/shaper_calibrate.py
@@ -6,6 +6,9 @@
 import collections, importlib, logging, math, multiprocessing, traceback
 shaper_defs = importlib.import_module('.shaper_defs', 'extras')
 
+# Improves compatibility with non-RPi Linux distributions.
+multiprocessing.set_start_method("fork", force=True)
+
 MIN_FREQ = 5.
 MAX_FREQ = 200.
 WINDOW_T_SEC = 0.5