diff --git a/ext/opcache/jit/zend_jit_helpers.c b/ext/opcache/jit/zend_jit_helpers.c
index 1ed5e0aaab9..f3845f25b5b 100644
--- a/ext/opcache/jit/zend_jit_helpers.c
+++ b/ext/opcache/jit/zend_jit_helpers.c
@@ -2662,6 +2662,13 @@ static ZEND_COLD zend_long _zend_jit_throw_dec_prop_error(zend_property_info *pr
 
 static void ZEND_FASTCALL zend_jit_inc_typed_prop(zval *var_ptr, zend_property_info *prop_info)
 {
+	ZEND_ASSERT(Z_TYPE_P(var_ptr) != IS_UNDEF);
+
+	if (UNEXPECTED((prop_info->flags & ZEND_ACC_READONLY))) {
+		zend_readonly_property_modification_error(prop_info);
+		return;
+	}
+
 	zend_execute_data *execute_data = EG(current_execute_data);
 	zval tmp;
 
@@ -2685,6 +2692,13 @@ static void ZEND_FASTCALL zend_jit_inc_typed_prop(zval *var_ptr, zend_property_i
 
 static void ZEND_FASTCALL zend_jit_dec_typed_prop(zval *var_ptr, zend_property_info *prop_info)
 {
+	ZEND_ASSERT(Z_TYPE_P(var_ptr) != IS_UNDEF);
+
+	if (UNEXPECTED((prop_info->flags & ZEND_ACC_READONLY))) {
+		zend_readonly_property_modification_error(prop_info);
+		return;
+	}
+
 	zend_execute_data *execute_data = EG(current_execute_data);
 	zval tmp;
 
@@ -2722,6 +2736,16 @@ static void ZEND_FASTCALL zend_jit_pre_dec_typed_prop(zval *var_ptr, zend_proper
 
 static void ZEND_FASTCALL zend_jit_post_inc_typed_prop(zval *var_ptr, zend_property_info *prop_info, zval *result)
 {
+	ZEND_ASSERT(Z_TYPE_P(var_ptr) != IS_UNDEF);
+
+	if (UNEXPECTED((prop_info->flags & ZEND_ACC_READONLY))) {
+		zend_readonly_property_modification_error(prop_info);
+		if (result) {
+			ZVAL_UNDEF(result);
+		}
+		return;
+	}
+
 	zend_execute_data *execute_data = EG(current_execute_data);
 
 	ZVAL_DEREF(var_ptr);
@@ -2743,6 +2767,16 @@ static void ZEND_FASTCALL zend_jit_post_inc_typed_prop(zval *var_ptr, zend_prope
 
 static void ZEND_FASTCALL zend_jit_post_dec_typed_prop(zval *var_ptr, zend_property_info *prop_info, zval *result)
 {
+	ZEND_ASSERT(Z_TYPE_P(var_ptr) != IS_UNDEF);
+
+	if (UNEXPECTED((prop_info->flags & ZEND_ACC_READONLY))) {
+		zend_readonly_property_modification_error(prop_info);
+		if (result) {
+			ZVAL_UNDEF(result);
+		}
+		return;
+	}
+
 	zend_execute_data *execute_data = EG(current_execute_data);
 
 	ZVAL_DEREF(var_ptr);
diff --git a/ext/opcache/tests/jit/readonly_001.phpt b/ext/opcache/tests/jit/readonly_001.phpt
new file mode 100644
index 00000000000..db56f9a25b0
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_001.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification post-inc
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        $this->bar++;
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_002.phpt b/ext/opcache/tests/jit/readonly_002.phpt
new file mode 100644
index 00000000000..aee19027007
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_002.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification pre-inc
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        ++$this->bar;
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_003.phpt b/ext/opcache/tests/jit/readonly_003.phpt
new file mode 100644
index 00000000000..73784919ef9
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_003.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification post-inc with result
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        var_dump($this->bar++);
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_004.phpt b/ext/opcache/tests/jit/readonly_004.phpt
new file mode 100644
index 00000000000..50054d2e83e
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_004.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification pre-inc with result
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        var_dump(++$this->bar);
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_005.phpt b/ext/opcache/tests/jit/readonly_005.phpt
new file mode 100644
index 00000000000..208fee03dbd
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_005.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification post-dec
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        $this->bar--;
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_006.phpt b/ext/opcache/tests/jit/readonly_006.phpt
new file mode 100644
index 00000000000..aceb16399b4
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_006.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification pre-dec
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        --$this->bar;
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_007.phpt b/ext/opcache/tests/jit/readonly_007.phpt
new file mode 100644
index 00000000000..9bee61c9a62
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_007.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification dec-inc with result
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        var_dump($this->bar--);
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d
diff --git a/ext/opcache/tests/jit/readonly_008.phpt b/ext/opcache/tests/jit/readonly_008.phpt
new file mode 100644
index 00000000000..c38f2cba56e
--- /dev/null
+++ b/ext/opcache/tests/jit/readonly_008.phpt
@@ -0,0 +1,25 @@
+--TEST--
+JIT readonly modification pre-dec with result
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.jit_buffer_size=1M
+--FILE--
+<?php
+class Foo {
+    public readonly int $bar;
+
+    public function __construct() {
+        $this->bar = 1;
+        var_dump(--$this->bar);
+    }
+}
+
+new Foo();
+?>
+--EXPECTF--
+Fatal error: Uncaught Error: Cannot modify readonly property Foo::$bar in %s:%d
+Stack trace:
+#0 %s(%d): Foo->__construct()
+#1 {main}
+  thrown in %s on line %d