Index: zend_compile.c
===================================================================
RCS file: /repository/ZendEngine2/zend_compile.c,v
retrieving revision 1.603
diff -u -r1.603 zend_compile.c
--- zend_compile.c	11 Jan 2005 17:17:48 -0000	1.603
+++ zend_compile.c	16 Jan 2005 18:41:40 -0000
@@ -1856,7 +1856,10 @@
 
 	if (parent->common.fn_flags & ZEND_ACC_ABSTRACT
 		&& parent->common.scope != (child->common.prototype ? child->common.prototype->common.scope : child->common.scope)
-		&& child->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_IMPLEMENTED_ABSTRACT)) {
+		&& child->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_IMPLEMENTED_ABSTRACT)
+		&& 
+		(parent->common.num_args != child->common.num_args || parent->common.required_num_args != child->common.required_num_args)
+		) {
 		zend_error(E_COMPILE_ERROR, "Can't inherit abstract function %s::%s() (previously declared abstract in %s)", 
 			parent->common.scope->name,
 			child->common.function_name,