diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JavaInfo.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JavaInfo.kt
index aad489b4..3c957454 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JavaInfo.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/JavaInfo.kt
@@ -3,11 +3,11 @@ package com.beust.kobalt
 import java.io.File
 
 abstract class JavaInfo {
-    var javaExecutable: File? = null
+    val javaExecutable: File?
         get() = findExecutable("java")
-    var javacExecutable: File? = null
+    val javacExecutable: File?
         get() = findExecutable("javac")
-    var javadocExecutable: File? = null
+    val javadocExecutable: File?
         get() = findExecutable("javadoc")
     abstract var javaHome: File?
     abstract var runtimeJar: File?
diff --git a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/Jvm.kt b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/Jvm.kt
index f11ee9d2..598ca401 100644
--- a/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/Jvm.kt
+++ b/modules/kobalt-plugin-api/src/main/kotlin/com/beust/kobalt/Jvm.kt
@@ -97,7 +97,7 @@ open class Jvm constructor(
         if (javaHome != null) {
             val jdkHome = if (javaHome!!.endsWith("jre")) javaHome!!.parentFile else javaHome
             val exec = File(jdkHome, "bin/" + command)
-            var executable = File(os.getExecutableName(exec.absolutePath))
+            val executable = File(os.getExecutableName(exec.absolutePath))
             if (executable.isFile) {
                 return executable
             }