diff --git a/configs/sim/axis/plasma/plasmac2/plasmac2.py b/configs/sim/axis/plasma/plasmac2/plasmac2.py
index f9a71b2271b..bc35db04737 100644
--- a/configs/sim/axis/plasma/plasmac2/plasmac2.py
+++ b/configs/sim/axis/plasma/plasmac2/plasmac2.py
@@ -2498,7 +2498,7 @@ def user_button_setup():
         elif bCode.strip() == 'cut-type' and not 'cut-type' in buttonCodes:
             bName = bName.split(',')
             if len(bName) == 1:
-                text = _('Pierce\Only') if '\\' in bName[0] else _('Pierce Only')
+                text = _('Pierce\\Only') if '\\' in bName[0] else _('Pierce Only')
                 bName.append(text)
             outCode = {'code':'cut-type', 'text':bName}
         elif bCode.strip() == 'single-cut' and not 'single-cut' in buttonCodes:
diff --git a/nc_files/holecircle.py b/nc_files/holecircle.py
index 2dabca89509..88023a3c8b5 100644
--- a/nc_files/holecircle.py
+++ b/nc_files/holecircle.py
@@ -27,9 +27,9 @@ def ui():
     f.grid(row=0, column=1, sticky="nw")
     b.grid(row=1, column=0, columnspan=2, sticky="ne")
 
-    validate_float    = "expr {[regexp {^-?([0-9]+(\.[0-9]*)?|\.[0-9]+|)$} %P]}"
+    validate_float    = "expr {[regexp {^-?([0-9]+(\\.[0-9]*)?|\\.[0-9]+|)$} %P]}"
     validate_int      = "expr {[regexp {^-?([0-9]+|)$} %P]}"
-    validate_posfloat = "expr {[regexp {^?([0-9]+(\.[0-9]*)?|\.[0-9]+|)$} %P]}"
+    validate_posfloat = "expr {[regexp {^?([0-9]+(\\.[0-9]*)?|\\.[0-9]+|)$} %P]}"
     validate_posint   = "expr {[regexp {^([0-9]+|)$} %P]}"
     def posfloatentry(f, v):
         var = tkinter.DoubleVar(f)