diff --git a/src/routes/v3/full-node/control.js b/src/routes/v3/full-node/control.js
index b253f40..310da58 100644
--- a/src/routes/v3/full-node/control.js
+++ b/src/routes/v3/full-node/control.js
@@ -71,7 +71,7 @@ class Control {
     } catch (error) {
       wlogger.error('Error in control.ts/getNetworkInfo().', error)
 
-      return this.errorHandler(error, res)
+      return _this.errorHandler(error, res)
     }
   }
   // router.get('/getMemoryInfo', (req, res, next) => {
diff --git a/src/routes/v3/full-node/mining.js b/src/routes/v3/full-node/mining.js
index 94e6ec1..89461c7 100644
--- a/src/routes/v3/full-node/mining.js
+++ b/src/routes/v3/full-node/mining.js
@@ -14,6 +14,7 @@ const util = require('util')
 util.inspect.defaultOptions = { depth: 1 }
 
 let _this
+
 class Mining {
   constructor () {
     _this = this
@@ -93,7 +94,7 @@ class Mining {
     } catch (err) {
       wlogger.error('Error in mining.ts/getMiningInfo().', err)
 
-      return this.errorHandler(err, res)
+      return _this.errorHandler(err, res)
     }
   }
 
@@ -129,7 +130,7 @@ class Mining {
     } catch (err) {
       wlogger.error('Error in mining.ts/getNetworkHashPS().', err)
 
-      return this.errorHandler(err, res)
+      return _this.errorHandler(err, res)
     }
   }