diff --git a/synapse/api/constants.py b/synapse/api/constants.py
index 105a3fe7c7..95ec369bc2 100644
--- a/synapse/api/constants.py
+++ b/synapse/api/constants.py
@@ -369,6 +369,6 @@ class StickyEventField(TypedDict):
 
 
 class StickyEvent:
-    QUERY_PARAM_NAME: Final = "msc4354_stick_duration_ms"
+    QUERY_PARAM_NAME: Final = "org.matrix.msc4354.sticky_duration_ms"
     FIELD_NAME: Final = "msc4354_sticky"
     MAX_DURATION_MS: Final = 3600000  # 1 hour