diff --git a/libcef/browser/zip_reader_impl.cc b/libcef/browser/zip_reader_impl.cc
index fac874618..4f509c495 100644
--- a/libcef/browser/zip_reader_impl.cc
+++ b/libcef/browser/zip_reader_impl.cc
@@ -267,7 +267,7 @@ bool CefZipReaderImpl::GetFileInfo() {
   time.tm_mon = file_info.tmu_date.tm_mon;
   time.tm_year = file_info.tmu_date.tm_year - 1900;  // Years since 1900.
   filemodified_ = mktime(&time);
-  DCHECK_NE(filemodified_, (size_t)-1);
+  DCHECK_NE(filemodified_, (time_t)-1);
 
   return true;
 }