diff --git a/routers/api/v1/repo/commits.go b/routers/api/v1/repo/commits.go
index d33be9d80a..cec7c3d534 100644
--- a/routers/api/v1/repo/commits.go
+++ b/routers/api/v1/repo/commits.go
@@ -195,7 +195,7 @@ func GetAllCommits(ctx *context.APIContext) {
 			// get commit specified by sha
 			baseCommit, err = ctx.Repo.GitRepo.GetCommit(sha)
 			if err != nil {
-				ctx.Error(http.StatusInternalServerError, "GetCommit", err)
+				ctx.NotFoundOrServerError("GetCommit", git.IsErrNotExist, err)
 				return
 			}
 		}