diff --git a/changelog.html b/changelog.html
index eb85bfc471..dd40be4795 100644
--- a/changelog.html
+++ b/changelog.html
@@ -61,6 +61,9 @@ Upcoming changes
Folder loading broken when child item loading throws exception.
(issue 22811)
+
+ Amend JAVA_HOME check to work with JDK 9.
+ (issue 25601)
Better support functional tests from Gradle-based plugins.
(issue 26331)
diff --git a/core/src/main/java/hudson/model/JDK.java b/core/src/main/java/hudson/model/JDK.java
index a06bac9c64..fe2152b8a6 100644
--- a/core/src/main/java/hudson/model/JDK.java
+++ b/core/src/main/java/hudson/model/JDK.java
@@ -182,7 +182,11 @@ public final class JDK extends ToolInstallation implements NodeSpecific, En
@Override protected FormValidation checkHomeDirectory(File value) {
File toolsJar = new File(value,"lib/tools.jar");
File mac = new File(value,"lib/dt.jar");
- if(!toolsJar.exists() && !mac.exists())
+
+ // JENKINS-25601: JDK 9+ no longer has tools.jar. Keep the existing dt.jar/tools.jar checks to be safe.
+ File javac = new File(value, "bin/javac");
+ File javacExe = new File(value, "bin/javac.exe");
+ if(!toolsJar.exists() && !mac.exists() && !javac.exists() && !javacExe.exists())
return FormValidation.error(Messages.Hudson_NotJDKDir(value));
return FormValidation.ok();