diff --git a/Lib/decimal.py b/Lib/decimal.py
index 5d25012..b775bee 100644
--- a/Lib/decimal.py
+++ b/Lib/decimal.py
@@ -2453,6 +2453,9 @@
 
     def sqrt(self, context=None):
         """Return the square root of self."""
+        if context is None:
+            context = getcontext()
+
         if self._is_special:
             ans = self._check_nans(context=context)
             if ans:
@@ -2466,9 +2469,6 @@
             ans = _dec_from_triple(self._sign, '0', self._exp // 2)
             return ans._fix(context)
 
-        if context is None:
-            context = getcontext()
-
         if self._sign == 1:
             return context._raise_error(InvalidOperation, 'sqrt(-x), x > 0')