diff --git a/src/rustint/core.clj b/src/rustint/core.clj
index 911d136..22d1cbd 100644
--- a/src/rustint/core.clj
+++ b/src/rustint/core.clj
@@ -2533,7 +2533,8 @@
   (cond
     (string? arg) "%s"
     (int? arg) "%d"
-    (and (float? arg) (nil? rustf)) "%.0f"
+    (and (float? arg) (nil? rustf) (== (pasar-a-int arg) arg)) "%.0f"
+    (and (float? arg) (nil? rustf)) "%f"
     (and (float? arg) (not (nil? rustf))) (format "%%%sf" rustf)
   )
 )