Index: src/lib/libmd/mdXhl.c
===================================================================
--- src/lib/libmd/mdXhl.c
+++ src/lib/libmd/mdXhl.c
@@ -74,7 +74,7 @@
 			i = read(f, buffer, sizeof(buffer));
 		else
 			i = read(f, buffer, n);
-		if (i < 0) 
+		if (i <= 0) 
 			break;
 		MDXUpdate(&ctx, buffer, i);
 		n -= i;