diff --git a/problemtype_generator/kratos_definitions/files/problemtype.tcl b/problemtype_generator/kratos_definitions/files/problemtype.tcl
index 3e59d8856aea..7225bc9eca7d 100755
--- a/problemtype_generator/kratos_definitions/files/problemtype.tcl
+++ b/problemtype_generator/kratos_definitions/files/problemtype.tcl
@@ -22,9 +22,9 @@ proc BeforeRunCalculation { batfilename basename dir problemtypedir gidexe args
     set filename [file join $dir "${basename}-3.dat"]
 
     set varfile [open $filename a]
-    puts $varfile "problem_name = '${basename}'"
-    puts $varfile "problem_path = '${dir}'"
-    puts $varfile "kratos_path = '${::kaux::kratos_path}'"
+    puts $varfile "problem_name = r'${basename}'"
+    puts $varfile "problem_path = r'${dir}'"
+    puts $varfile "kratos_path =  r'${::kaux::kratos_path}'"
     puts $varfile ""
     close $varfile
 }