diff --git a/misc/debugstr.c b/misc/debugstr.c
index d5d8e69..7882b0f 100644
--- a/misc/debugstr.c
+++ b/misc/debugstr.c
@@ -173,7 +173,7 @@
 	  break;
 	default:
 	  if (*s<' ')
-	    printf ("\\0x%02x", *s);
+	    fprintf (stderr, "\\0x%02x", *s);
 	  else
 	    fputc (*s, stderr);
 	}