diff --git a/lang/cpp/src/context.cpp b/lang/cpp/src/context.cpp
index 6b657f60..7b386801 100644
--- a/lang/cpp/src/context.cpp
+++ b/lang/cpp/src/context.cpp
@@ -1527,7 +1527,7 @@ Error Context::startCreateSubkey(const Key &k, const char *algo,
                  k.impl(), algo, reserved, expires, flags));
 }
 
-std::string Context::getLFSeparatedListOfFingerprintsFromSubkeys(const std::vector<Subkey> &subkeys)
+static std::string getLFSeparatedListOfFingerprintsFromSubkeys(const std::vector<Subkey> &subkeys)
 {
     if (subkeys.empty()) {
         return std::string();
diff --git a/lang/cpp/src/context.h b/lang/cpp/src/context.h
index ebf5adb2..9cd35a5c 100644
--- a/lang/cpp/src/context.h
+++ b/lang/cpp/src/context.h
@@ -500,8 +500,6 @@ private:
     // on the "Friendlyness" of context to access the gpgme types.
     gpgme_key_t *getKeysFromRecipients(const std::vector<Key> &recipients);
 
-    std::string getLFSeparatedListOfFingerprintsFromSubkeys(const std::vector<Subkey> &subkeys);
-
 private:
     Private *const d;