diff --git a/ext/standard/array.c b/ext/standard/array.c
index a328fc5f720..7b429f93e78 100644
--- a/ext/standard/array.c
+++ b/ext/standard/array.c
@@ -1492,7 +1492,7 @@ PHP_FUNCTION(extract)
 
 					*orig_var = *entry;
 				} else {
-					if (var_array->refcount > 1) {
+					if (var_array->refcount > 1 || *entry == EG(uninitialized_zval_ptr)) {
 						SEPARATE_ZVAL_TO_MAKE_IS_REF(entry);
 					} else {
 						(*entry)->is_ref = 1;
diff --git a/ext/standard/tests/array/bug30074.phpt b/ext/standard/tests/array/bug30074.phpt
new file mode 100644
index 00000000000..7720fe00067
--- /dev/null
+++ b/ext/standard/tests/array/bug30074.phpt
@@ -0,0 +1,15 @@
+--TEST--
+Bug #30074 (EG(uninitialized_zval_ptr) gets set to reference using EXTR_REFS, affecting later values)
+--FILE--
+<?php
+error_reporting(E_ALL & ~E_NOTICE);   // We don't want the notice for $undefined
+$result = extract(array('a'=>$undefined), EXTR_REFS); 
+var_dump(array($a));
+echo "Done\n";
+?>
+--EXPECT--
+array(1) {
+  [0]=>
+  NULL
+}
+Done