diff --git a/bubulles.c b/bubulles.c
index 7f0e1ca..c6b0724 100644
--- a/bubulles.c
+++ b/bubulles.c
@@ -229,7 +229,7 @@ fprintf(stderr, "*** %s : array at %p, sz %d\n", __func__, ar, bbl->size);
 #endif
 
 for (idx=0; idx<bbl->fidx; idx++) {
-	fprintf(fp, "%12.6f  %12.6f  %12.6f",
+	fprintf(fp, "%15.8f  %15.8f  %15.8f",
 			ar[idx].p.x, ar[idx].p.y, ar[idx].p.z);
 	if (opts & 0x01)	fprintf(fp, "  %12.6f", ar[idx].d);
 	if (opts & 0x02)	fprintf(fp, "  %6d",    ar[idx].gray);