diff --git a/runtime/path_convert/src/path_conv.cpp b/runtime/path_convert/src/path_conv.cpp
index 14540c0..e5206f4 100644
--- a/runtime/path_convert/src/path_conv.cpp
+++ b/runtime/path_convert/src/path_conv.cpp
@@ -551,7 +551,7 @@ path_type find_path_start_and_type(const char** src, int recurse, const char* en
                         goto skip_p2w;
                     return POSIX_PATH_LIST;
                 }
-            } else if (memchr(it2, '=', end - it) == NULL) {
+            } else if (memchr(it2, '=', end - it2) == NULL) {
                 return SIMPLE_WINDOWS_PATH;
             }
         } else if (ch != '.') {