diff --git a/changes/412.bugfix.rst b/changes/412.bugfix.rst
new file mode 100644
index 00000000..a2b1d94e
--- /dev/null
+++ b/changes/412.bugfix.rst
@@ -0,0 +1 @@
+Renamed mosaic association model variable name.
diff --git a/src/roman_datamodels/maker_utils/_common_meta.py b/src/roman_datamodels/maker_utils/_common_meta.py
index 90b6ec2a..26ed3521 100644
--- a/src/roman_datamodels/maker_utils/_common_meta.py
+++ b/src/roman_datamodels/maker_utils/_common_meta.py
@@ -498,11 +498,11 @@ def mk_mosaic_associations(**kwargs):
     roman_datamodels.stnode.MosaicAssociations
     """
 
-    mosass = stnode.MosaicAssociations()
-    mosass["pool_name"] = kwargs.get("pool_name", NOSTR)
-    mosass["table_name"] = kwargs.get("table_name", NOSTR)
+    mosasn = stnode.MosaicAssociations()
+    mosasn["pool_name"] = kwargs.get("pool_name", NOSTR)
+    mosasn["table_name"] = kwargs.get("table_name", NOSTR)
 
-    return mosass
+    return mosasn
 
 
 def mk_guidewindow_meta(**kwargs):