diff --git a/petale/models.py b/petale/models.py
index 2941f51..6c4af68 100644
--- a/petale/models.py
+++ b/petale/models.py
@@ -172,8 +172,8 @@ class Petal(models.Model):
         if content_length > self.partner.hard_per_key_max_size * 1024:
             raise PetalSizeExhausted
 
-        if (self.size <= self.partner.soft_per_key_max_size * 1024 and content_length >
-                self.partner.soft_per_key_max_size * 1024):
+        if (self.size <= self.partner.soft_per_key_max_size * 1024
+                and content_length > self.partner.soft_per_key_max_size * 1024):
             self.partner.notify_admins(
                 # pylint: disable=no-member
                 _('Key {key} space of partner {partner} almost exhausted').format(