diff --git a/django/db/backends/utils.py b/django/db/backends/utils.py
index 5dd6d85486..e5b2d5235f 100644
--- a/django/db/backends/utils.py
+++ b/django/db/backends/utils.py
@@ -161,7 +161,7 @@ def typecast_timestamp(s):  # does NOT store time zone information
 
 
 def typecast_decimal(s):
-    if s is None or s == '':
+    if s is None:
         return None
     return decimal.Decimal(s)