diff --git a/block.c b/block.c
index 090923c..cb5d7ae 100644
--- a/block.c
+++ b/block.c
@@ -3869,7 +3869,7 @@
     }
 
     if (!quiet) {
-        printf("Formatting '%s', fmt=%s", filename, fmt);
+        printf("Formatting '%s', fmt=%s ", filename, fmt);
         qemu_opts_print(opts, " ");
         puts("");
     }