diff --git a/Objects/stringlib/formatter.h b/Objects/stringlib/formatter.h
index 2e3e5a6..86235a6 100644
--- a/Objects/stringlib/formatter.h
+++ b/Objects/stringlib/formatter.h
@@ -789,7 +789,7 @@
 
     if (precision < 0)
         precision = 6;
-    if (type == 'f' && (fabs(x) / 1e25) >= 1e25)
+    if (type == 'f' && fabs(x) >= 1e50)
         type = 'g';
 
     /* cast "type", because if we're in unicode we need to pass a