diff --git a/pym/calculate/lib/cl_template.py b/pym/calculate/lib/cl_template.py
index 62e0d5c..660e970 100644
--- a/pym/calculate/lib/cl_template.py
+++ b/pym/calculate/lib/cl_template.py
@@ -3365,7 +3365,7 @@ class templateFunction(_error, _warning, _shareTemplate, _shareTermsFunction):
                     textArgv = term[1:-1]
                     for replTerm in replTerms:
                         textArgv = textArgv.replace(*replTerm)
-                    textArgv = re.sub(r'\\x(\d\d)',
+                    textArgv = re.sub(r'\\x([0-9a-fA-F]{2})',
                         lambda x:chr(int(x.group(1),16)),textArgv)
                     listArgv.append(textArgv)
                 elif term.startswith("'") and term.endswith("'"):