diff --git a/models/repo_unit.go b/models/repo_unit.go
index d4c74515f..b208276d9 100644
--- a/models/repo_unit.go
+++ b/models/repo_unit.go
@@ -113,6 +113,24 @@ func (cfg *PullRequestsConfig) IsMergeStyleAllowed(mergeStyle MergeStyle) bool {
 		mergeStyle == MergeStyleSquash && cfg.AllowSquash
 }
 
+// AllowedMergeStyleCount returns the total count of allowed merge styles for the PullRequestsConfig
+func (cfg *PullRequestsConfig) AllowedMergeStyleCount() int {
+	count := 0
+	if cfg.AllowMerge {
+		count++
+	}
+	if cfg.AllowRebase {
+		count++
+	}
+	if cfg.AllowRebaseMerge {
+		count++
+	}
+	if cfg.AllowSquash {
+		count++
+	}
+	return count
+}
+
 // BeforeSet is invoked from XORM before setting the value of a field of this object.
 func (r *RepoUnit) BeforeSet(colName string, val xorm.Cell) {
 	switch colName {
diff --git a/templates/repo/issue/view_content/pull.tmpl b/templates/repo/issue/view_content/pull.tmpl
index 347b3b15d..f7870d60d 100644
--- a/templates/repo/issue/view_content/pull.tmpl
+++ b/templates/repo/issue/view_content/pull.tmpl
@@ -335,23 +335,25 @@
 									{{end}}
 									</span>
 								</button>
-								<div class="ui dropdown icon button">
-									{{svg "octicon-triangle-down" 14 "dropdown icon"}}
-									<div class="menu">
-										{{if $prUnit.PullRequestsConfig.AllowMerge}}
-										<div class="item{{if eq .MergeStyle "merge"}} active selected{{end}}" data-do="merge">{{$.i18n.Tr "repo.pulls.merge_pull_request"}}</div>
-										{{end}}
-										{{if $prUnit.PullRequestsConfig.AllowRebase}}
-										<div class="item{{if eq .MergeStyle "rebase"}} active selected{{end}}" data-do="rebase">{{$.i18n.Tr "repo.pulls.rebase_merge_pull_request"}}</div>
-										{{end}}
-										{{if $prUnit.PullRequestsConfig.AllowRebaseMerge}}
-										<div class="item{{if eq .MergeStyle "rebase-merge"}} active selected{{end}}" data-do="rebase-merge">{{$.i18n.Tr "repo.pulls.rebase_merge_commit_pull_request"}}</div>
-										{{end}}
-										{{if $prUnit.PullRequestsConfig.AllowSquash}}
-										<div class="item{{if eq .MergeStyle "squash"}} active selected{{end}}" data-do="squash">{{$.i18n.Tr "repo.pulls.squash_merge_pull_request"}}</div>
-										{{end}}
+								{{if gt $prUnit.PullRequestsConfig.AllowedMergeStyleCount 1}}
+									<div class="ui dropdown icon button">
+										{{svg "octicon-triangle-down" 14 "dropdown icon"}}
+										<div class="menu">
+											{{if $prUnit.PullRequestsConfig.AllowMerge}}
+											<div class="item{{if eq .MergeStyle "merge"}} active selected{{end}}" data-do="merge">{{$.i18n.Tr "repo.pulls.merge_pull_request"}}</div>
+											{{end}}
+											{{if $prUnit.PullRequestsConfig.AllowRebase}}
+											<div class="item{{if eq .MergeStyle "rebase"}} active selected{{end}}" data-do="rebase">{{$.i18n.Tr "repo.pulls.rebase_merge_pull_request"}}</div>
+											{{end}}
+											{{if $prUnit.PullRequestsConfig.AllowRebaseMerge}}
+											<div class="item{{if eq .MergeStyle "rebase-merge"}} active selected{{end}}" data-do="rebase-merge">{{$.i18n.Tr "repo.pulls.rebase_merge_commit_pull_request"}}</div>
+											{{end}}
+											{{if $prUnit.PullRequestsConfig.AllowSquash}}
+											<div class="item{{if eq .MergeStyle "squash"}} active selected{{end}}" data-do="squash">{{$.i18n.Tr "repo.pulls.squash_merge_pull_request"}}</div>
+											{{end}}
+										</div>
 									</div>
-								</div>
+								{{end}}
 							</div>
 						{{else}}
 							<div class="ui divider"></div>