diff --git a/src/module_wrap.cc b/src/module_wrap.cc
index 4b60b6b8e4bb0e..816c68d55d16ce 100644
--- a/src/module_wrap.cc
+++ b/src/module_wrap.cc
@@ -433,16 +433,15 @@ std::string ReadFile(uv_file file) {
   uv_fs_t req;
   char buffer_memory[4096];
   uv_buf_t buf = uv_buf_init(buffer_memory, sizeof(buffer_memory));
-  int r;
 
   do {
-    r = uv_fs_read(uv_default_loop(),
-                   &req,
-                   file,
-                   &buf,
-                   1,
-                   contents.length(),  // offset
-                   nullptr);
+    const int r = uv_fs_read(uv_default_loop(),
+                             &req,
+                             file,
+                             &buf,
+                             1,
+                             contents.length(),  // offset
+                             nullptr);
     uv_fs_req_cleanup(&req);
 
     if (r <= 0)