diff --git a/ext/standard/dl.c b/ext/standard/dl.c
index aae0996384562..7b47c4726d1a7 100644
--- a/ext/standard/dl.c
+++ b/ext/standard/dl.c
@@ -205,6 +205,11 @@ PHPAPI int php_load_extension(const char *filename, int type, int start_now)
 		return FAILURE;
 	}
 	module_entry = get_module();
+	if (zend_hash_str_exists(&module_registry, module_entry->name, strlen(module_entry->name))) {
+		DL_UNLOAD(handle);
+		zend_error(E_CORE_WARNING, "Module \"%s\" is already loaded", module_entry->name);
+		return FAILURE;
+	}
 	if (module_entry->zend_api != ZEND_MODULE_API_NO) {
 			php_error_docref(NULL, error_type,
 					"%s: Unable to initialize module\n"
diff --git a/ext/standard/tests/general_functions/gh9589.phpt b/ext/standard/tests/general_functions/gh9589.phpt
new file mode 100644
index 0000000000000..a26f052debeb8
--- /dev/null
+++ b/ext/standard/tests/general_functions/gh9589.phpt
@@ -0,0 +1,10 @@
+--TEST--
+dl() segfaults when module is already loaded
+--EXTENSIONS--
+dl_test
+--FILE--
+<?php
+dl("dl_test");
+?>
+--EXPECT--
+Warning: Module "dl_test" is already loaded in Unknown on line 0