diff --git a/src/libsync/httplogger.cpp b/src/libsync/httplogger.cpp
index d86fd83a76c..fc10616a611 100644
--- a/src/libsync/httplogger.cpp
+++ b/src/libsync/httplogger.cpp
@@ -34,12 +34,6 @@ Q_LOGGING_CATEGORY(lcNetworkHttp, "sync.httplogger", QtWarningMsg)
 
 const qint64 PeekSize = 1024 * 1024;
 
-bool isTextBody(const QString &s)
-{
-    static const QRegularExpression regexp(QStringLiteral("^(text/.*?|(application/(xml|.*?json|x-www-form-urlencoded)(;|$)))"));
-    return regexp.match(s).hasMatch();
-}
-
 struct HttpContext
 {
     HttpContext(const QNetworkRequest &request)
@@ -106,7 +100,7 @@ void logHttp(const QByteArray &verb, HttpContext *ctx, QJsonObject &&header, QIO
     QJsonObject body = {{QStringLiteral("length"), contentLength}};
     if (contentLength > 0) {
         const QString contentType = header.value(QStringLiteral("Content-Type")).toString();
-        if (isTextBody(contentType)) {
+        if (OCC::HttpLogger::isTextBody(contentType)) {
             if (!device->isOpen()) {
                 Q_ASSERT(dynamic_cast<QBuffer *>(device));
                 // should we close it again?
@@ -205,4 +199,9 @@ QByteArray HttpLogger::requestVerb(QNetworkAccessManager::Operation operation, c
     Q_UNREACHABLE();
 }
 
+bool HttpLogger::isTextBody(const QString &s)
+{
+    static const QRegularExpression regexp(QStringLiteral("^(text/.*?|(application/(xml|.*?json|x-www-form-urlencoded)(;|$)))"));
+    return regexp.match(s).hasMatch();
+}
 }
diff --git a/src/libsync/httplogger.h b/src/libsync/httplogger.h
index 2dde6c11703..5f010835fb1 100644
--- a/src/libsync/httplogger.h
+++ b/src/libsync/httplogger.h
@@ -30,5 +30,7 @@ namespace HttpLogger {
     {
         return requestVerb(reply.operation(), reply.request());
     }
+
+    bool OWNCLOUDSYNC_EXPORT isTextBody(const QString &s);
 }
 }
diff --git a/test/testutility.cpp b/test/testutility.cpp
index af2dacaf4be..4ec883a3408 100644
--- a/test/testutility.cpp
+++ b/test/testutility.cpp
@@ -12,6 +12,7 @@
 
 #include "common/filesystembase.h"
 #include "common/utility.h"
+#include "libsync/httplogger.h"
 
 using namespace std::chrono_literals;
 
@@ -322,6 +323,12 @@ private Q_SLOTS:
         QVERIFY(Tags::remove(fn, testKey));
         QVERIFY(!Tags::get(fn, testKey).has_value());
     }
+
+    void testHttpContentTypeIsText()
+    {
+        QVERIFY(OCC::HttpLogger::isTextBody(QStringLiteral("application/json; charset=utf-8")));
+        QVERIFY(OCC::HttpLogger::isTextBody(QStringLiteral("application/json")));
+    }
 };
 
 QTEST_GUILESS_MAIN(TestUtility)