diff --git a/src/lib/parameters/px4params/jsonout.py b/src/lib/parameters/px4params/jsonout.py
index 25ee3c1290c7..73ddace0a397 100644
--- a/src/lib/parameters/px4params/jsonout.py
+++ b/src/lib/parameters/px4params/jsonout.py
@@ -52,8 +52,8 @@ def __init__(self, groups, board, inject_xml_file_name):
                     if (param.GetCategory()):
                         curr_param['category'] = param.GetCategory()
 
-                    if (param.GetVolatile() == "true"):
-                        curr_param['volatile'] = param.GetVolatile()
+                    if param.GetVolatile():
+                        curr_param['volatile'] = "True"
 
                     last_param_name = param.GetName()
                     for code in param.GetFieldCodes():
diff --git a/src/lib/parameters/px4params/srcparser.py b/src/lib/parameters/px4params/srcparser.py
index 6de995b66b3f..e3d7944f356c 100644
--- a/src/lib/parameters/px4params/srcparser.py
+++ b/src/lib/parameters/px4params/srcparser.py
@@ -58,8 +58,8 @@ def __init__(self, name, type, default = ""):
         self.name = name
         self.type = type
         self.default = default
-        self.volatile = "false"
         self.category = ""
+        self.volatile = False
         self.boolean = False
 
     def GetName(self):
@@ -102,7 +102,7 @@ def SetVolatile(self):
         """
         Set volatile flag
         """
-        self.volatile = "true"
+        self.volatile = True
 
     def SetBoolean(self):
         """
diff --git a/src/lib/parameters/px4params/xmlout.py b/src/lib/parameters/px4params/xmlout.py
index e95dba2f085f..ecbd5a3dc6f5 100644
--- a/src/lib/parameters/px4params/xmlout.py
+++ b/src/lib/parameters/px4params/xmlout.py
@@ -39,8 +39,10 @@ def __init__(self, groups, board):
                     xml_param.attrib["name"] = param.GetName()
                     xml_param.attrib["default"] = param.GetDefault()
                     xml_param.attrib["type"] = param.GetType()
-                    if (param.GetVolatile() == "true"):
-                        xml_param.attrib["volatile"] = param.GetVolatile()
+                    if param.GetVolatile():
+                        xml_param.attrib["volatile"] = "true"
+                    if param.GetBoolean():
+                        xml_param.attrib["boolean"] = "true"
                     if (param.GetCategory()):
                         xml_param.attrib["category"] = param.GetCategory()
                     last_param_name = param.GetName()