diff --git a/lib/python/gladevcp/hal_gremlin.py b/lib/python/gladevcp/hal_gremlin.py
index c0cfd5675ea..03196116611 100644
--- a/lib/python/gladevcp/hal_gremlin.py
+++ b/lib/python/gladevcp/hal_gremlin.py
@@ -261,7 +261,7 @@ def dro_format(self,s,spd,dtg,limit,homed,positions,axisdtg,g5x_offset,g92_offse
                 pos=0
                 for i in range(9):
                     if s.axis_mask & (1<<i): pos +=1
-                if self.is_lathe:
+                if self.is_lathe():
                     pos +=1
                 droposstrs.insert(pos, " " + format % ("Vel", spd))