diff --git a/uopz.c b/uopz.c
index 5e95192..53dfd97 100644
--- a/uopz.c
+++ b/uopz.c
@@ -277,6 +277,12 @@ static PHP_FUNCTION(uopz_set_return)
 		return;
 	}
 
+#ifndef ZEND_EXIT
+	if (clazz == NULL && zend_string_equals_literal_ci(function, "exit")) {
+		RETURN_TRUE;
+	}
+#endif
+
 	RETURN_BOOL(uopz_set_return(clazz, function, variable, execute));
 } /* }}} */
 
@@ -296,6 +302,12 @@ static PHP_FUNCTION(uopz_unset_return)
 		return;
 	}
 
+#ifndef ZEND_EXIT
+	if (clazz == NULL && zend_string_equals_literal_ci(function, "exit")) {
+		RETURN_FALSE;
+	}
+#endif
+
 	RETURN_BOOL(uopz_unset_return(clazz, function));
 } /* }}} */