1 files changed, 1 insertions, 1 deletions
diff --git a/buff.h b/buff.h
index 020e3b2..14be917 100644
--- a/buff.h
+++ b/buff.h
@@ -5,7 +5,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#define E printf("?\n")
+#define E fprintf(stderr, "?\n")
 #define CHECKADDR  if (addr1 < addr2){ E; break;}