diff --git a/src/file.c b/src/file.c
index 165bc9f..e799dd9 100644
--- a/src/file.c
+++ b/src/file.c
@@ -65,7 +65,7 @@ bool file_update(File *file) {
   }
   // read file
   read_length = fread(file->content, sizeof(char), length, file_pointer);
-  if (read_length != length) {
+  if (read_length != (unsigned)length) {
     file->error = true;
     fclose(file_pointer);
     log_error("Cannot read complete file '%s'", file->path);