diff --git a/Zend/zend_API.c b/Zend/zend_API.c
index 0ccb4ec68f5..b74fa0fc7a0 100644
--- a/Zend/zend_API.c
+++ b/Zend/zend_API.c
@@ -3281,7 +3281,10 @@ ZEND_API zend_result zend_register_class_alias_ex(const char *name, size_t name_
 		if (!(ce->ce_flags & ZEND_ACC_IMMUTABLE)) {
 			ce->refcount++;
 		}
-		zend_observer_class_linked_notify(ce, lcname);
+		// avoid notifying at MINIT time
+		if (ce->type == ZEND_USER_CLASS) {
+			zend_observer_class_linked_notify(ce, lcname);
+		}
 		return SUCCESS;
 	}
 	return FAILURE;
diff --git a/ext/opcache/ZendAccelerator.c b/ext/opcache/ZendAccelerator.c
index e87d81acfeb..b1c86e79c24 100644
--- a/ext/opcache/ZendAccelerator.c
+++ b/ext/opcache/ZendAccelerator.c
@@ -35,6 +35,7 @@
 #include "zend_inheritance.h"
 #include "zend_exceptions.h"
 #include "zend_mmap.h"
+#include "zend_observer.h"
 #include "main/php_main.h"
 #include "main/SAPI.h"
 #include "main/php_streams.h"
@@ -4480,6 +4481,7 @@ static int accel_preload(const char *config, bool in_child)
 		script->script.main_op_array.fn_flags |= ZEND_ACC_DONE_PASS_TWO;
 		script->script.main_op_array.last = 1;
 		script->script.main_op_array.last_literal = 1;
+		script->script.main_op_array.T = ZEND_OBSERVER_ENABLED;
 #if ZEND_USE_ABS_CONST_ADDR
 		script->script.main_op_array.literals = (zval*)emalloc(sizeof(zval));
 #else
diff --git a/ext/zend_test/tests/observer_preload.inc b/ext/zend_test/tests/observer_preload.inc
new file mode 100644
index 00000000000..7652014f91b
--- /dev/null
+++ b/ext/zend_test/tests/observer_preload.inc
@@ -0,0 +1,13 @@
+<?php
+
+class Foo {
+    public static function test() {
+        return "foo::test";
+    }
+}
+
+if (true) {
+    function foo() {
+        return 'I should be observable';
+    }
+}
\ No newline at end of file
diff --git a/ext/zend_test/tests/observer_preload.phpt b/ext/zend_test/tests/observer_preload.phpt
new file mode 100644
index 00000000000..a5de8fba03c
--- /dev/null
+++ b/ext/zend_test/tests/observer_preload.phpt
@@ -0,0 +1,38 @@
+--TEST--
+Observer: Test with basic preloading
+--EXTENSIONS--
+zend_test
+opcache
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+opcache.preload={PWD}/observer_preload.inc
+zend_test.observer.enabled=1
+zend_test.observer.observe_all=1
+zend_test.observer.observe_declaring=1
+zend_test.observer.show_return_value=1
+--FILE--
+<?php
+
+Foo::test();
+foo();
+
+echo 'Done' . PHP_EOL;
+?>
+--EXPECTF--
+<!-- declared class 'foo' -->
+<!-- init '%sobserver_preload.inc' -->
+<file '%sobserver_preload.inc'>
+  <!-- declared function 'foo' -->
+</file '%sobserver_preload.inc'>
+<!-- init '%sobserver_preload.php' -->
+<file '%sobserver_preload.php'>
+  <!-- init Foo::test() -->
+  <Foo::test>
+  </Foo::test:'foo::test'>
+  <!-- init foo() -->
+  <foo>
+  </foo:'I should be observable'>
+Done
+</file '%sobserver_preload.php'>
\ No newline at end of file