diff --git a/api.go b/api.go
index 935e1e1..6a1c3aa 100644
--- a/api.go
+++ b/api.go
@@ -19,6 +19,7 @@ type StatsResponse struct {
 	Skipped             int    `json:"skipped"`
 	Latest              int    `json:"latest"`
 	Queued              int    `json:"queued"`
+	Building            int    `json:"building"`
 	LastMirrorTimestamp *int64 `json:"last_mirror_timestamp,omitempty"`
 	LTO                 *struct {
 		Enabled  int `json:"enabled"`
@@ -73,6 +74,8 @@ func GetStats(w http.ResponseWriter, r *http.Request) {
 			resp.Latest = c.Count
 		case dbpackage.StatusQueued:
 			resp.Queued = c.Count
+		case dbpackage.StatusBuilding:
+			resp.Building = c.Count
 		}
 	}
 
diff --git a/openapi_alhp.yaml b/openapi_alhp.yaml
index 8756f77..e335266 100644
--- a/openapi_alhp.yaml
+++ b/openapi_alhp.yaml
@@ -224,6 +224,11 @@ components:
           format: int64
           description: Number of packages currently in the build queue
           example: 5
+        building:
+          type: integer
+          format: int64
+          description: Number of packages currently building
+          example: 11
         last_mirror_timestamp:
           type: integer
           format: int64