diff --git a/pixz.h b/pixz.h
index 3b57c89..66e6c2b 100644
--- a/pixz.h
+++ b/pixz.h
@@ -20,7 +20,7 @@
 
 #define CHUNKSIZE 4096
 
-#define DEBUG 1
+#define DEBUG 0
 #if DEBUG
     #define debug(str, ...) fprintf(stderr, str "\n", ##__VA_ARGS__)
 #else