diff --git a/ext/phar/phar.c b/ext/phar/phar.c
index e7a61f277e9..2add0135740 100644
--- a/ext/phar/phar.c
+++ b/ext/phar/phar.c
@@ -2180,9 +2180,9 @@ char *phar_fix_filepath(char *path, size_t *new_len, int use_cwd) /* {{{ */
 		ptr_length = ptr - tok;
 last_time:
 		if (IS_DIRECTORY_UP(tok, ptr_length)) {
-#define PREVIOUS newpath[newpath_len - 1]
+			const char previous = newpath[newpath_len - 1];
 
-			while (newpath_len > 1 && !IS_BACKSLASH(PREVIOUS)) {
+			while (newpath_len > 1 && !IS_BACKSLASH(previous)) {
 				newpath_len--;
 			}