diff --git a/server/src/main/java/com/defold/extender/Extender.java b/server/src/main/java/com/defold/extender/Extender.java
index a583a372..ae0a2875 100644
--- a/server/src/main/java/com/defold/extender/Extender.java
+++ b/server/src/main/java/com/defold/extender/Extender.java
@@ -525,6 +525,13 @@ public File buildJavaExtension(File manifest, Map<String, Object> manifestContex
             if (rJar != null) {
                 classPath += ":" + rJar.getAbsolutePath();
             }
+
+            // Get extension supplied Jar libraries
+            List<String> extJars = getJars(extDir);
+            for (String jarPath : extJars) {
+                classPath += ":" + jarPath;
+            }
+
             context.put("classPath", classPath);
             context.put("sourcesListFile", sourcesListFile.getAbsolutePath());
             String command = templateExecutor.execute(platformConfig.javacCmd, context);
diff --git a/server/src/test/java/com/defold/extender/ExtenderTest.java b/server/src/test/java/com/defold/extender/ExtenderTest.java
index 7fe4d5de..6b308891 100644
--- a/server/src/test/java/com/defold/extender/ExtenderTest.java
+++ b/server/src/test/java/com/defold/extender/ExtenderTest.java
@@ -290,7 +290,7 @@ public void testCollectLibraries() {
     @Test
     public void testCollectJars() {
         List<String> result = Extender.collectFilesByPath(new File("test-data/ext/lib/armv7-android"), "(.+\\.jar)");
-        assertEquals(1, result.size());
+        assertEquals(2, result.size());
         assertTrue(result.get(0).endsWith("test-data/ext/lib/armv7-android/Dummy.jar"));
     }
 
diff --git a/server/src/test/java/com/defold/extender/IntegrationTest.java b/server/src/test/java/com/defold/extender/IntegrationTest.java
index f2e2668f..321ea44f 100644
--- a/server/src/test/java/com/defold/extender/IntegrationTest.java
+++ b/server/src/test/java/com/defold/extender/IntegrationTest.java
@@ -393,6 +393,69 @@ public void buildAndroidCheckCompiledJava() throws IOException, ExtenderClientEx
         assertTrue(dexClasses.contains("Lcom/defold/Test;"));
     }
 
+    /*
+     * Test if a Java source can import classes specified in a supplied Jar file.
+     */
+    @Test
+    public void buildAndroidJavaJarDependency() throws IOException, ExtenderClientException, InterruptedException {
+
+        org.junit.Assume.assumeTrue("Defold version does not support Java compilation test.",
+                configuration.platform.contains("android") &&
+                        (configuration.version.version.isGreaterThan(1, 2, 103) || configuration.version.version.isVersion(0, 0, 0) )
+        );
+
+        clearCache();
+
+        File cacheDir = new File("build");
+        ExtenderClient extenderClient = new ExtenderClient("http://localhost:" + EXTENDER_PORT, cacheDir);
+        List<ExtenderResource> sourceFiles = Lists.newArrayList(
+                new FileExtenderResource("test-data/ext/ext.manifest"),
+                new FileExtenderResource("test-data/ext/src/test_ext.cpp"),
+                new FileExtenderResource("test-data/ext/src/TestJar.java"),
+                new FileExtenderResource("test-data/ext/lib/armv7-android/libalib.a"),
+                new FileExtenderResource("test-data/ext/lib/armv7-android/JarDep.jar"));
+        File destination = Files.createTempFile("dmengine", ".zip").toFile();
+        File log = Files.createTempFile("dmengine", ".log").toFile();
+
+        String platform = configuration.platform;
+        String sdkVersion = configuration.version.sha1;
+
+        try {
+            extenderClient.build(
+                    platform,
+                    sdkVersion,
+                    sourceFiles,
+                    destination,
+                    log
+            );
+        } catch (ExtenderClientException e) {
+            System.out.println(new String(Files.readAllBytes(log.toPath())));
+            throw e;
+        }
+
+        assertTrue("Resulting engine should be of a size greater than zero.", destination.length() > 0);
+        assertEquals("Log should be of size zero if successful.", 0, log.length());
+
+        ZipFile zipFile = new ZipFile(destination);
+        ZipEntry classesDexEntry = zipFile.getEntry("classes.dex");
+        assertNotEquals(null, classesDexEntry);
+        assertNotEquals(null, zipFile.getEntry("libdmengine.so"));
+
+
+        InputStream in = zipFile.getInputStream(classesDexEntry);
+        Path tmpClassesDexPath = Files.createTempFile("classes", "dex");
+        Files.copy(in, tmpClassesDexPath, StandardCopyOption.REPLACE_EXISTING);
+
+        // Verify that classes.dex contains our Dummy class and our compiled Java class
+        DexFile dexFile = DexFileFactory.loadDexFile(tmpClassesDexPath.toFile().getAbsolutePath(), 19 ); // api level
+        Set<String> dexClasses = new HashSet<>();
+        for (ClassDef classDef: dexFile.getClasses()) {
+            dexClasses.add(classDef.getType());
+        }
+
+        assertTrue(dexClasses.contains("Lcom/defold/JarDep;"));
+        assertTrue(dexClasses.contains("Lcom/defold/Test;"));
+    }
     @Test
     public void buildAndroidRJar() throws IOException, ExtenderClientException, InterruptedException {
 
diff --git a/server/test-data/ext/lib/armv7-android/JarDep.jar b/server/test-data/ext/lib/armv7-android/JarDep.jar
new file mode 100644
index 00000000..fc89d60e
Binary files /dev/null and b/server/test-data/ext/lib/armv7-android/JarDep.jar differ
diff --git a/server/test-data/ext/src/TestJar.java b/server/test-data/ext/src/TestJar.java
new file mode 100644
index 00000000..06106195
--- /dev/null
+++ b/server/test-data/ext/src/TestJar.java
@@ -0,0 +1,9 @@
+package com.defold;
+
+import com.defold.JarDep;
+
+class Test {
+    static String doStuff() {
+        return JarDep.DoStuff();
+    }
+}
\ No newline at end of file