diff --git a/data/a1/xml/a1.xml b/data/a1/xml/a1.xml
index 39f17da..bd86bb6 100644
--- a/data/a1/xml/a1.xml
+++ b/data/a1/xml/a1.xml
@@ -176,9 +176,9 @@
 
         <gyro name="Body_Gyro" site="imu"/>
 
-        <framepos name="Body_Pos" objtype=site objname="imu"/>
+        <framepos name="Body_Pos" objtype="site" objname="imu"/>
 
-        <framequat name="Body_Quat" objtype=site objname="imu"/>
+        <framequat name="Body_Quat" objtype="site" objname="imu"/>
         
     
     </sensor>
diff --git a/data/aliengo/xml/aliengo.xml b/data/aliengo/xml/aliengo.xml
index 71c5cd8..77fddae 100644
--- a/data/aliengo/xml/aliengo.xml
+++ b/data/aliengo/xml/aliengo.xml
@@ -177,9 +177,9 @@
 
         <gyro name="Body_Gyro" site="imu"/>
 
-        <framepos name="Body_Pos" objtype=site objname="imu"/>
+        <framepos name="Body_Pos" objtype="site" objname="imu"/>
 
-        <framequat name="Body_Quat" objtype=site objname="imu"/>
+        <framequat name="Body_Quat" objtype="site" objname="imu"/>
 
     </sensor>
 </mujoco>
diff --git a/data/go1/xml/go1.xml b/data/go1/xml/go1.xml
index 5638d58..5890c58 100644
--- a/data/go1/xml/go1.xml
+++ b/data/go1/xml/go1.xml
@@ -186,9 +186,9 @@
 
         <gyro name="Body_Gyro" site="imu"/>
 
-        <framepos name="Body_Pos" objtype=site objname="imu"/>
+        <framepos name="Body_Pos" objtype="site" objname="imu"/>
 
-        <framequat name="Body_Quat" objtype=site objname="imu"/>
+        <framequat name="Body_Quat" objtype="site" objname="imu"/>
         
     
     </sensor>
diff --git a/data/laikago/xml/laikago.xml b/data/laikago/xml/laikago.xml
index 6a2829b..2175d29 100644
--- a/data/laikago/xml/laikago.xml
+++ b/data/laikago/xml/laikago.xml
@@ -169,9 +169,9 @@
 
         <gyro name="Body_Gyro" site="imu"/>
 
-        <framepos name="Body_Pos" objtype=site objname="imu"/>
+        <framepos name="Body_Pos" objtype="site" objname="imu"/>
 
-        <framequat name="Body_Quat" objtype=site objname="imu"/>
+        <framequat name="Body_Quat" objtype="site" objname="imu"/>
 
     </sensor>