diff --git a/Zend/zend.h b/Zend/zend.h
index 38f461c350388..fce65e0337fc0 100644
--- a/Zend/zend.h
+++ b/Zend/zend.h
@@ -200,9 +200,9 @@ char *alloca ();
 #endif
 
 #if ZEND_DEBUG
-#define ZEND_FILE_LINE_D				char *__zend_filename, uint __zend_lineno
+#define ZEND_FILE_LINE_D				const char *__zend_filename, const uint __zend_lineno
 #define ZEND_FILE_LINE_DC				, ZEND_FILE_LINE_D
-#define ZEND_FILE_LINE_ORIG_D			char *__zend_orig_filename, uint __zend_orig_lineno
+#define ZEND_FILE_LINE_ORIG_D			const char *__zend_orig_filename, const uint __zend_orig_lineno
 #define ZEND_FILE_LINE_ORIG_DC			, ZEND_FILE_LINE_ORIG_D
 #define ZEND_FILE_LINE_RELAY_C			__zend_filename, __zend_lineno
 #define ZEND_FILE_LINE_RELAY_CC			, ZEND_FILE_LINE_RELAY_C