diff --git a/qiskit/circuit/library/standard_gates/rzz.py b/qiskit/circuit/library/standard_gates/rzz.py
index 5ca974764d3..5f78be0352f 100644
--- a/qiskit/circuit/library/standard_gates/rzz.py
+++ b/qiskit/circuit/library/standard_gates/rzz.py
@@ -71,7 +71,7 @@ class RZZGate(Gate):
 
         .. math::
 
-            R_{ZZ}(\theta = \pi) = - Z \otimes Z
+            R_{ZZ}(\theta = \pi) = - i Z \otimes Z
 
         .. math::