diff --git a/skins/JSON/current_minimal.json.tmpl b/skins/JSON/current_minimal.json.tmpl
index 5f5cf2f..a69b92a 100644
--- a/skins/JSON/current_minimal.json.tmpl
+++ b/skins/JSON/current_minimal.json.tmpl
@@ -9,7 +9,7 @@
     },
     "generation":
     {
-        #if $Extras.timestamp_fmt is "human"
+        #if $Extras.timestamp_fmt == "human"
         "time": "$current.dateTime.format("%a, %d %b %Y %H:%M:%S %Z")",
         #else
         "time": "$current.dateTime.format("%Y-%m-%dT%H:%M:%S%z")",
diff --git a/skins/JSON/weewx.json.tmpl b/skins/JSON/weewx.json.tmpl
index 3129370..4a30d0d 100644
--- a/skins/JSON/weewx.json.tmpl
+++ b/skins/JSON/weewx.json.tmpl
@@ -9,7 +9,7 @@
     },
     "generation":
     {
-        #if $Extras.timestamp_fmt is "human"
+        #if $Extras.timestamp_fmt == "human"
         "time": "$current.dateTime.format("%a, %d %b %Y %H:%M:%S %Z")",
         #else
         "time": "$current.dateTime.format("%Y-%m-%dT%H:%M:%S%z")",