diff --git a/routers/common/repo.go b/routers/common/repo.go
index b3cd749115fb1..c127dcbc23caa 100644
--- a/routers/common/repo.go
+++ b/routers/common/repo.go
@@ -88,7 +88,7 @@ func ServeData(ctx *context.Context, name string, size int64, reader io.Reader)
 		}
 		if (st.IsImage() || st.IsPDF()) && (setting.UI.SVG.Enabled || !st.IsSvgImage()) {
 			ctx.Resp.Header().Set("Content-Disposition", fmt.Sprintf(`inline; filename="%s"`, name))
-			if st.IsSvgImage() || st.IsPDF() {
+			if st.IsSvgImage() {
 				ctx.Resp.Header().Set("Content-Security-Policy", "default-src 'none'; style-src 'unsafe-inline'; sandbox")
 				ctx.Resp.Header().Set("X-Content-Type-Options", "nosniff")
 				if st.IsSvgImage() {