diff --git a/src/Mod/CAM/Path/Post/scripts/linuxcnc_post.py b/src/Mod/CAM/Path/Post/scripts/linuxcnc_post.py
index fabf340ff5..bdc0207e54 100644
--- a/src/Mod/CAM/Path/Post/scripts/linuxcnc_post.py
+++ b/src/Mod/CAM/Path/Post/scripts/linuxcnc_post.py
@@ -172,7 +172,7 @@ M2"""
 
             # Update PREAMBLE with blend command
             blend_cmd = self._get_blend_command()
-            self.values["PREAMBLE"] += f'\n{blend_cmd}'
+            self.values["PREAMBLE"] += f"\n{blend_cmd}"
 
         return flag, args