diff --git a/src/custom_modules/VoidGPIO.js b/src/custom_modules/VoidGPIO.js
index 9cb97d4..b1ae3c0 100644
--- a/src/custom_modules/VoidGPIO.js
+++ b/src/custom_modules/VoidGPIO.js
@@ -52,6 +52,7 @@ module.exports = {
             if (stderr) {
                 callback(new Error(stderr));
             }
+            callback(null);
         });
     },
     // Calls the GPIO Interface script to read a pin's state