diff --git a/Zend/zend_variables.c b/Zend/zend_variables.c
index 6c0a882cdf5..e57ad0de331 100644
--- a/Zend/zend_variables.c
+++ b/Zend/zend_variables.c
@@ -89,7 +89,7 @@ ZEND_API void _zval_dtor(zval *zvalue ZEND_FILE_LINE_DC)
 }
 
 
-void zval_del_ref(zval **p)
+ZEND_API void zval_del_ref(zval **p)
 {
 	(*p)->refcount--;
 	if ((*p)->refcount==0) {
@@ -99,7 +99,7 @@ void zval_del_ref(zval **p)
 }                                                                                                                               
 
 
-void zval_add_ref(zval **p)
+ZEND_API void zval_add_ref(zval **p)
 {
 	(*p)->refcount++;
 }
diff --git a/Zend/zend_variables.h b/Zend/zend_variables.h
index e3740030030..7d080fa223a 100644
--- a/Zend/zend_variables.h
+++ b/Zend/zend_variables.h
@@ -48,8 +48,8 @@ ZEND_API void _zval_ptr_dtor_wrapper(zval **zval_ptr);
 END_EXTERN_C()
 
 
-void zval_add_ref(zval **p);
-void zval_del_ref(zval **p);
+ZEND_API void zval_add_ref(zval **p);
+ZEND_API void zval_del_ref(zval **p);
 
 #define ZVAL_DESTRUCTOR (void (*)(void *)) zval_dtor_wrapper
 #define ZVAL_PTR_DTOR (void (*)(void *)) zval_ptr_dtor_wrapper