diff --git a/Zend/zend_API.h b/Zend/zend_API.h
index e5d612c3fa50e..fb642c1475587 100644
--- a/Zend/zend_API.h
+++ b/Zend/zend_API.h
@@ -60,7 +60,7 @@ typedef struct _zend_fcall_info_cache {
 	zval *object_ptr;
 } zend_fcall_info_cache;
 
-#define ZEND_NS_NAME(ns, name)			ns"\\"name
+#define ZEND_NS_NAME(ns, name)			ns "\\" name
 
 #define ZEND_FN(name) zif_##name
 #define ZEND_MN(name) zim_##name