diff --git a/client.js b/client.js
index 8a578fa..b6bf1a7 100644
--- a/client.js
+++ b/client.js
@@ -14,7 +14,7 @@ const allowedParams = ['allowClientCode', 'allowQueryStringCookies', 'chunkSize'
  * @locus Client
  * @class FilesCollection
  * @param config {FilesCollectionConfig} - [anywhere] configuration object with the following properties:
- * @param config.debug {boolean} - [anywhere] turn on/off debugging and extra logging
+ * @param config.debug {boolean|function} - [anywhere] Turn on/of debugging and extra logging to console, or pass your own function to handle debug messages on your own
  * @param config.ddp {DDP.DDPStatic} - [client] custom DDP connection; object returned from `DDP.connect()`
  * @param config.schema {object} - [anywhere] collection schema
  * @param config.public {boolean} - [anywhere] store files in folder accessible for proxy servers, for limits, etc.
@@ -48,7 +48,7 @@ class FilesCollection extends FilesCollectionCore {
       allowQueryStringCookies: this.allowQueryStringCookies,
     });
 
-    if (!helpers.isBoolean(this.debug)) {
+    if (!helpers.isBoolean(this.debug) && !helpers.isFunction(this.debug)) {
       this.debug = false;
     }
 
diff --git a/core.js b/core.js
index c32f234..c8302db 100644
--- a/core.js
+++ b/core.js
@@ -104,8 +104,10 @@ export default class FilesCollectionCore extends EventEmitter {
    */
   _debug(...args) {
     if (this.debug) {
+      // if debug is truthy but not true it should be a function
+      const debugFn = this.debug === true ? null : this.debug;
       // eslint-disable-next-line no-console
-      (console.info || console.log || function () {}).apply(undefined, args);
+      (debugFn || console.info || console.log || function () {}).apply(undefined, args);
     }
   }
 
diff --git a/docs/constructor.md b/docs/constructor.md
index eb1dc04..a10b36d 100644
--- a/docs/constructor.md
+++ b/docs/constructor.md
@@ -639,13 +639,13 @@
     </tr>
     <tr>
       <td align="right">
-        <code>config.debug</code> {<em>Boolean</em>}
+        <code>config.debug</code> {<em>Boolean|Function</em>}
       </td>
       <td>
         Isomorphic
       </td>
       <td>
-        Turn on/of debugging and extra logging
+        Turn on/off debugging and extra logging to console, or pass your own function to handle debug messages on your own
       </td>
       <td>
         <code>false</code>
diff --git a/server.js b/server.js
index b6ed555..d5eeb48 100644
--- a/server.js
+++ b/server.js
@@ -73,7 +73,7 @@ const createIndex = async (_collection, keys, opts) => {
  * @locus Server
  * @class FilesCollection
  * @param config           {FilesCollectionConfig}   - [Both]   Configuration object with next properties:
- * @param config.debug     {boolean}  - [Both]   Turn on/of debugging and extra logging
+ * @param config.debug     {boolean|function}  - [Both]   Turn on/off debugging and extra logging to console, or pass your own function to handle debug messages on your own
  * @param config.schema    {Object}   - [Both]   Collection Schema
  * @param config.public    {boolean}  - [Both]   Store files in folder accessible for proxy servers, for limits, and more - read docs
  * @param config.strict    {boolean}  - [Server] Strict mode for partial content, if is `true` server will return `416` response code, when `range` is not specified, otherwise server return `206`
@@ -161,7 +161,7 @@ class FilesCollection extends FilesCollectionCore {
 
     const self = this;
 
-    if (!helpers.isBoolean(this.debug)) {
+    if (!helpers.isBoolean(this.debug) && !helpers.isFunction(this.debug)) {
       this.debug = false;
     }