diff --git a/devtools/client/netmonitor/har/har-builder.js b/devtools/client/netmonitor/har/har-builder.js
index 61e01c3f951c..ecc52e4c4cbd 100644
--- a/devtools/client/netmonitor/har/har-builder.js
+++ b/devtools/client/netmonitor/har/har-builder.js
@@ -312,6 +312,7 @@ HarBuilder.prototype = {
     let responseContent = file.responseContent;
     if (responseContent && responseContent.content) {
       content.size = responseContent.content.size;
+      content.encoding = responseContent.content.encoding;
     }
 
     let includeBodies = this._options.includeResponseBodies;
diff --git a/devtools/server/actors/webconsole.js b/devtools/server/actors/webconsole.js
index 6d62ad4b1bd0..17ddb67a8028 100644
--- a/devtools/server/actors/webconsole.js
+++ b/devtools/server/actors/webconsole.js
@@ -2080,6 +2080,7 @@ NetworkEventActor.prototype =
       updateType: "responseContent",
       mimeType: aContent.mimeType,
       contentSize: aContent.size,
+      encoding: aContent.encoding,
       transferredSize: aContent.transferredSize,
       discardResponseBody: aDiscardedResponseBody,
     };