diff --git a/ecj-java8compat.patch b/ecj-java8compat.patch
new file mode 100644
index 0000000..984f7d4
--- /dev/null
+++ b/ecj-java8compat.patch
@@ -0,0 +1,93 @@
+--- a/build.xml	2022-03-08 08:19:52.000000000 +0100
++++ b/build.xml	2024-02-13 02:31:15.760059399 +0100
+@@ -26,8 +26,8 @@
+ 		<javac srcdir="${basedir}" destdir="${output}"
+ 					debuglevel="lines,source"
+ 					debug="true"
+-					release="11">
+-			<compilerarg line="-Xlint:none --patch-module java.compiler=javax17api.jar"/>
++					source="8" target="8">
++			<compilerarg line="-Xlint:none"/>
+ 		</javac>
+ 
+ 		<delete file="${basedir}/META-INF/MANIFEST.MF" failonerror="false"/>
+--- a/org/eclipse/jdt/internal/compiler/apt/util/EclipseFileManager.java	2022-03-08 08:19:50.000000000 +0100
++++ b/org/eclipse/jdt/internal/compiler/apt/util/EclipseFileManager.java	2024-02-13 02:40:37.158638361 +0100
+@@ -1281,7 +1281,7 @@
+ 	private Iterable<? extends File> getFiles(final Iterable<? extends Path> paths) {
+ 		if (paths == null)
+ 			return null;
+-		return () -> new Iterator<>() {
++		return () -> new Iterator<File>() {
+ 			Iterator<? extends Path> original = paths.iterator();
+ 			@Override
+ 			public boolean hasNext() {
+@@ -1296,7 +1296,7 @@
+ 	private Iterable<? extends Path> getPaths(final Iterable<? extends File> files) {
+ 		if (files == null)
+ 			return null;
+-		return () -> new Iterator<>() {
++		return () -> new Iterator<Path>() {
+ 			Iterator<? extends File> original = files.iterator();
+ 			@Override
+ 			public boolean hasNext() {
+--- a/org/eclipse/jdt/internal/compiler/lookup/SourceTypeBinding.java	2022-03-08 08:19:50.000000000 +0100
++++ b/org/eclipse/jdt/internal/compiler/lookup/SourceTypeBinding.java	2024-02-13 02:32:54.251379205 +0100
+@@ -3319,7 +3319,7 @@
+ 		}
+ 	}
+ 	// sort them in according to their own indexes
+-	Arrays.sort(bindings, new Comparator<>() {
++	Arrays.sort(bindings, new Comparator<SyntheticMethodBinding>() {
+ 		@Override
+ 		public int compare(SyntheticMethodBinding o1, SyntheticMethodBinding o2) {
+ 			return o1.index - o2.index;
+--- a/org/eclipse/jdt/internal/compiler/tool/EclipseCompilerImpl.java	2022-03-08 08:19:50.000000000 +0100
++++ b/org/eclipse/jdt/internal/compiler/tool/EclipseCompilerImpl.java	2024-02-13 02:38:57.913975827 +0100
+@@ -239,7 +239,7 @@
+ 				DiagnosticListener<? super JavaFileObject> diagListener = EclipseCompilerImpl.this.diagnosticListener;
+ 				Diagnostic<JavaFileObject> diagnostic = null;
+ 				if (diagListener != null) {
+-					diagnostic = new Diagnostic<>() {
++					diagnostic = new Diagnostic<JavaFileObject>() {
+ 						@Override
+ 						public String getCode() {
+ 							return Integer.toString(problemId);
+@@ -316,7 +316,7 @@
+ 				DiagnosticListener<? super JavaFileObject> diagListener = EclipseCompilerImpl.this.diagnosticListener;
+ 				Diagnostic<JavaFileObject> diagnostic = null;
+ 				if (diagListener != null) {
+-					diagnostic = new Diagnostic<>() {
++					diagnostic = new Diagnostic<JavaFileObject>() {
+ 						@Override
+ 						public String getCode() {
+ 							return Integer.toString(problemId);
+@@ -797,7 +797,7 @@
+ 			Iterator iterator = this.extraProblems.iterator(); iterator.hasNext(); ) {
+ 			final CategorizedProblem problem = (CategorizedProblem) iterator.next();
+ 			if (this.diagnosticListener != null && !isIgnored(problem)) {
+-				Diagnostic<JavaFileObject> diagnostic = new Diagnostic<>() {
++				Diagnostic<JavaFileObject> diagnostic = new Diagnostic<JavaFileObject>() {
+ 					@Override
+ 					public String getCode() {
+ 						return null;
+--- a/org/eclipse/jdt/internal/compiler/tool/EclipseFileManager.java	2022-03-08 08:19:50.000000000 +0100
++++ b/org/eclipse/jdt/internal/compiler/tool/EclipseFileManager.java	2024-02-13 02:41:33.840827055 +0100
+@@ -1310,7 +1310,7 @@
+ 	private Iterable<? extends File> getFiles(final Iterable<? extends Path> paths) {
+ 		if (paths == null)
+ 			return null;
+-		return () -> new Iterator<>() {
++		return () -> new Iterator<File>() {
+ 			Iterator<? extends Path> original = paths.iterator();
+ 			@Override
+ 			public boolean hasNext() {
+@@ -1325,7 +1325,7 @@
+ 	private Iterable<? extends Path> getPaths(final Iterable<? extends File> files) {
+ 		if (files == null)
+ 			return null;
+-		return () -> new Iterator<>() {
++		return () -> new Iterator<Path>() {
+ 			Iterator<? extends File> original = files.iterator();
+ 			@Override
+ 			public boolean hasNext() {
diff --git a/ecj.changes b/ecj.changes
index 43a79fa..033e0aa 100644
--- a/ecj.changes
+++ b/ecj.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Tue Feb 13 01:50:04 UTC 2024 - Fridrich Strba <fstrba@suse.com>
+
+- Added patch:
+  * ecj-java8compat.patch
+    + Allow building ecj with language levels 8
+
 -------------------------------------------------------------------
 Mon Aug 21 11:46:03 UTC 2023 - Fridrich Strba <fstrba@suse.com>
 
diff --git a/ecj.spec b/ecj.spec
index 8aeacf5..8f906a0 100644
--- a/ecj.spec
+++ b/ecj.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package ecj
 #
-# Copyright (c) 2023 SUSE LLC
+# Copyright (c) 2024 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -32,6 +32,7 @@ Source1:        https://repo1.maven.org/maven2/org/eclipse/jdt/ecj/%{bundle_ver}
 # Extracted from https://download.eclipse.org/eclipse/downloads/drops4/%%{drop}/ecj-%%{jar_ver}.jar
 Source2:        MANIFEST.MF
 Patch0:         ecj-rpmdebuginfo.patch
+Patch1:         ecj-java8compat.patch
 BuildRequires:  ant
 BuildRequires:  java-devel >= 11
 BuildRequires:  javapackages-local >= 6
@@ -45,6 +46,7 @@ the JDT Core batch compiler.
 %prep
 %setup -q -c
 %patch0 -p1
+%patch1 -p1
 
 # Specify encoding
 sed -i -e '/compilerarg/s/Xlint:none/Xlint:none -encoding cp1252/' build.xml