diff --git a/lib/osinfo.js b/lib/osinfo.js
index f6d88a0..e461f4b 100644
--- a/lib/osinfo.js
+++ b/lib/osinfo.js
@@ -589,8 +589,7 @@ function versions(callback) {
         if (_darwin) {
           // check if any JVM is installed but avoid dialog box that Java needs to be installed
           exec('/usr/libexec/java_home -V 2>&1', function (error, stdout) {
-            const output = stdout.toString().toLowerCase();
-            if (output.indexOf('no java runtime') === -1) {
+            if (!error && stdout.toString().toLowerCase().indexOf('no java runtime') === -1) {
               // now this can be done savely
               exec('java -version 2>&1', function (error, stdout) {
                 if (!error) {