diff --git a/sdutil/sdutil.c b/sdutil/sdutil.c
index 53919f3..080a6a1 100644
--- a/sdutil/sdutil.c
+++ b/sdutil/sdutil.c
@@ -166,8 +166,11 @@ static size_t sectors_done = 0;
 static void format_update(size_t sector, size_t sector_count) {
   (void)sector;
 
-  char spinner_char = spinner[(spinner_state++) % (sizeof(spinner) - 1)];
-  mprintf(ANSIQ_CUR_SET_COL(0) ANSIQ_SCR_CLR2LEND "%c %zu", spinner_char, sectors_done);
+  if (sector % 100 == 0) {
+    char spinner_char = spinner[(spinner_state++) % 4];
+    mprintf(ANSIQ_CUR_SET_COL(0) ANSIQ_SCR_CLR2LEND "%c %zu", spinner_char, sectors_done);
+  }
+
   sectors_done += sector_count;
 }