diff --git a/changelogs/fragments/2349-jira-bugfix-b64decode.yml b/changelogs/fragments/2349-jira-bugfix-b64decode.yml
new file mode 100644
index 0000000000..41a1dabb94
--- /dev/null
+++ b/changelogs/fragments/2349-jira-bugfix-b64decode.yml
@@ -0,0 +1,2 @@
+bugfixes:
+  - jira - fixed error when loading base64-encoded content as attachment (https://github.com/ansible-collections/community.general/pull/2349).
diff --git a/plugins/modules/web_infrastructure/jira.py b/plugins/modules/web_infrastructure/jira.py
index d7c88c01b8..3c1a8a27c9 100644
--- a/plugins/modules/web_infrastructure/jira.py
+++ b/plugins/modules/web_infrastructure/jira.py
@@ -596,7 +596,7 @@ def _prepare_attachment(filename, content=None, mime_type=None):
             content = f.read()
     else:
         try:
-            content = base64.decode(content)
+            content = base64.b64decode(content)
         except binascii.Error as e:
             raise Exception("Unable to base64 decode file content: %s" % e)