diff --git a/.changelog/17726.txt b/.changelog/17726.txt
new file mode 100644
index 000000000000..e122be8be26a
--- /dev/null
+++ b/.changelog/17726.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+api: add missing constant for unknown allocation status
+```
diff --git a/api/allocations.go b/api/allocations.go
index 1cf66aba0589..3ec147f21c83 100644
--- a/api/allocations.go
+++ b/api/allocations.go
@@ -30,6 +30,7 @@ const (
 	AllocClientStatusComplete = "complete"
 	AllocClientStatusFailed   = "failed"
 	AllocClientStatusLost     = "lost"
+	AllocClientStatusUnknown  = "unknown"
 )
 
 const (