diff --git a/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp b/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp
index 84bf0245..3187a0cd 100644
--- a/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp
+++ b/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp
@@ -39,6 +39,7 @@
 #endif
 
 #include "qgpgmerefreshsmimekeysjob.h"
+#include "util.h"
 
 #include <QDebug>
 #include "qgpgme_debug.h"
@@ -101,12 +102,7 @@ GpgME::Error QGpgMERefreshSMIMEKeysJob::start(const std::vector<GpgME::Key> &key
         return GpgME::Error::fromCode(GPG_ERR_INV_VALUE);
     }
 
-    QStringList fprs;
-    fprs.reserve(keys.size());
-    std::transform(std::begin(keys), std::end(keys), std::back_inserter(fprs), [](const auto &k) {
-        return QString::fromLatin1(k.primaryFingerprint());
-    });
-    return start(fprs);
+    return start(toFingerprints(keys));
 }
 
 #if MAX_CMD_LENGTH < 65 + 128
diff --git a/lang/qt/src/util.cpp b/lang/qt/src/util.cpp
index 81cdf077..66c7eedd 100644
--- a/lang/qt/src/util.cpp
+++ b/lang/qt/src/util.cpp
@@ -38,6 +38,10 @@
 #include "util.h"
 
 #include <QStringList>
+
+#include <key.h>
+
+#include <algorithm>
 #include <functional>
 
 std::vector<std::string> toStrings(const QStringList &l)
@@ -49,3 +53,13 @@ std::vector<std::string> toStrings(const QStringList &l)
                    std::mem_fn(&QString::toStdString));
     return v;
 }
+
+QStringList toFingerprints(const std::vector<GpgME::Key> &keys)
+{
+    QStringList fprs;
+    fprs.reserve(keys.size());
+    std::transform(std::begin(keys), std::end(keys), std::back_inserter(fprs), [](const auto &k) {
+        return QString::fromLatin1(k.primaryFingerprint());
+    });
+    return fprs;
+}
diff --git a/lang/qt/src/util.h b/lang/qt/src/util.h
index 94c97333..c6aa87ce 100644
--- a/lang/qt/src/util.h
+++ b/lang/qt/src/util.h
@@ -41,6 +41,11 @@
 
 class QStringList;
 
+namespace GpgME
+{
+class Key;
+}
+
 static inline gpgme_error_t make_error(gpgme_err_code_t code)
 {
     return gpgme_err_make((gpgme_err_source_t)22, code);
@@ -48,4 +53,6 @@ static inline gpgme_error_t make_error(gpgme_err_code_t code)
 
 std::vector<std::string> toStrings(const QStringList &l);
 
+QStringList toFingerprints(const std::vector<GpgME::Key> &keys);
+
 #endif // __QGPGME_UTIL_H__