diff --git a/gen_input/templates/CORENAME_cyles.txt.gtl b/gen_input/templates/CORENAME_cyles.txt.gtl
index cef9f6f..1202094 100644
--- a/gen_input/templates/CORENAME_cyles.txt.gtl
+++ b/gen_input/templates/CORENAME_cyles.txt.gtl
@@ -3,8 +3,8 @@
 		{
 			"name"  :   "${instr.name}",
 			"size"  :   ${instr.length},
-			"encoding": ${instr.encoding},
-            "mask":     ${instr.mask},
+			"encoding": "${instr.encoding}",
+            "mask":     "${instr.mask}",
 			"branch":   ${instr.modifiesPC},
 			"delay" :   ${instr.isConditional?"[1,1]":"1"}
 		}<%}%>