diff --git a/Utilities/File.cpp b/Utilities/File.cpp
index 6063ae05d7..ce0e0096c1 100644
--- a/Utilities/File.cpp
+++ b/Utilities/File.cpp
@@ -1088,7 +1088,7 @@ fs::file::file(const std::string& path, bs_t<open_mode> mode)
 	if (mode & fs::trunc && mode & (fs::lock + fs::unread))
 	{
 		// Postpone truncation in order to avoid using O_TRUNC on a locked file
-		::ftruncate(fd, 0);
+		verify(HERE), ::ftruncate(fd, 0) == 0;
 	}
 
 	class unix_file final : public file_base