diff --git a/models/branches.go b/models/branches.go
index f2bf9a80a..a1e97ffaa 100644
--- a/models/branches.go
+++ b/models/branches.go
@@ -99,11 +99,12 @@ func (protectBranch *ProtectedBranch) HasEnoughApprovals(pr *PullRequest) bool {
 
 // GetGrantedApprovalsCount returns the number of granted approvals for pr. A granted approval must be authored by a user in an approval whitelist.
 func (protectBranch *ProtectedBranch) GetGrantedApprovalsCount(pr *PullRequest) int64 {
-	reviews, err := GetReviewersByPullID(pr.ID)
+	reviews, err := GetReviewersByPullID(pr.Issue.ID)
 	if err != nil {
 		log.Error(1, "GetUniqueApprovalsByPullRequestID:", err)
 		return 0
 	}
+
 	approvals := int64(0)
 	userIDs := make([]int64, 0)
 	for _, review := range reviews {
diff --git a/routers/repo/issue.go b/routers/repo/issue.go
index c04cc2774..e0fb4ac52 100644
--- a/routers/repo/issue.go
+++ b/routers/repo/issue.go
@@ -776,6 +776,7 @@ func ViewIssue(ctx *context.Context) {
 
 	if issue.IsPull {
 		pull := issue.PullRequest
+		pull.Issue = issue
 		canDelete := false
 
 		if ctx.IsSigned {
@@ -833,8 +834,9 @@ func ViewIssue(ctx *context.Context) {
 			return
 		}
 		if pull.ProtectedBranch != nil {
-			ctx.Data["IsBlockedByApprovals"] = !pull.ProtectedBranch.HasEnoughApprovals(pull)
-			ctx.Data["GrantedApprovals"] = pull.ProtectedBranch.GetGrantedApprovalsCount(pull)
+			cnt := pull.ProtectedBranch.GetGrantedApprovalsCount(pull)
+			ctx.Data["IsBlockedByApprovals"] = pull.ProtectedBranch.RequiredApprovals > 0 && cnt < pull.ProtectedBranch.RequiredApprovals
+			ctx.Data["GrantedApprovals"] = cnt
 		}
 		ctx.Data["IsPullBranchDeletable"] = canDelete && pull.HeadRepo != nil && git.IsBranchExist(pull.HeadRepo.RepoPath(), pull.HeadBranch)