diff --git a/src/work.cpp b/src/work.cpp
index 1d3799ef..84d07d26 100644
--- a/src/work.cpp
+++ b/src/work.cpp
@@ -81,7 +81,7 @@ void do_one_file(const char *iname, char *oname)
 #endif
     if (st.st_size <= 0)
         throwIOException("empty file -- skipped");
-    if (st.st_size < 1024)
+    if (st.st_size < 512)
         throwIOException("file is too small -- skipped");
     if (st.st_size >= 1024*1024*1024)
         throwIOException("file is too large -- skipped");