diff --git a/routers/install.go b/routers/install.go
index b8b7dec1e7..668912960c 100644
--- a/routers/install.go
+++ b/routers/install.go
@@ -242,6 +242,16 @@ func InstallPost(ctx *middleware.Context, form auth.InstallForm) {
 		return
 	}
 
+	// Set default log path if empty.
+	workDir, err := setting.WorkDir()
+	if err != nil {
+		log.Fatal(4, "Fail to get work directory: %v", err)
+	}
+
+	if len(form.LogRootPath) == 0 {
+		form.LogRootPath = path.Join(workDir, "log")
+	}
+
 	// Test log root path.
 	form.LogRootPath = strings.Replace(form.LogRootPath, "\\", "/", -1)
 	if err := os.MkdirAll(form.LogRootPath, os.ModePerm); err != nil {
diff --git a/templates/install.tmpl b/templates/install.tmpl
index b3d4d7339d..1d97abf528 100644
--- a/templates/install.tmpl
+++ b/templates/install.tmpl
@@ -109,9 +109,9 @@
 						<input id="app_url" name="app_url" value="{{.app_url}}" placeholder="e.g. https://try.gogs.io" required>
 						<span class="help">{{.i18n.Tr "install.app_url_helper"}}</span>
 					</div>
-					<div class="inline required field">
+					<div class="inline field">
 						<label for="log_root_path">{{.i18n.Tr "install.log_root_path"}}</label>
-						<input id="log_root_path" name="log_root_path" value="{{.log_root_path}}" placeholder="log" required>
+						<input id="log_root_path" name="log_root_path" value="{{.log_root_path}}" placeholder="log">
 						<span class="help">{{.i18n.Tr "install.log_root_path_helper"}}</span>
 					</div>