diff --git a/NEWS b/NEWS
index b7ccf0b1..0807fe4e 100644
--- a/NEWS
+++ b/NEWS
@@ -14,6 +14,9 @@ Noteworthy changes in version 1.17.2 (unreleased)
  cpp: RevocationReason                      NEW.
  cpp: GpgRevokeKeyEditInteractor            NEW.
  cpp: Result::setError                      NEW.
+ cpp: KeyListMode::ForceExtern              NEW.
+ cpp: KeyListMode::LocateExternal           NEW.
+ cpp: KeyListMode::KeyListModeMask          NEW.
  qt: RevokeKeyJob                           NEW.
  qt: Protocol::revokeKeyJob                 NEW.
 
diff --git a/lang/cpp/src/context.cpp b/lang/cpp/src/context.cpp
index 6d840f06..89bc3fd7 100644
--- a/lang/cpp/src/context.cpp
+++ b/lang/cpp/src/context.cpp
@@ -1849,6 +1849,7 @@ std::ostream &operator<<(std::ostream &os, KeyListMode mode)
     CHECK(WithTofu);
     CHECK(WithKeygrip);
     CHECK(WithSecret);
+    CHECK(ForceExtern);
 #undef CHECK
     return os << ')';
 }
diff --git a/lang/cpp/src/global.h b/lang/cpp/src/global.h
index 9aafea87..1336142a 100644
--- a/lang/cpp/src/global.h
+++ b/lang/cpp/src/global.h
@@ -60,14 +60,18 @@ enum Engine { GpgEngine, GpgSMEngine, GpgConfEngine, UnknownEngine, AssuanEngine
 enum KeyListMode {
     Local = 0x1,
     Extern = 0x2,
-    Locate = 0x3,
+    Locate = Local|Extern,
     Signatures = 0x4,
     SignatureNotations = 0x8,
     Validate = 0x10,
     Ephemeral = 0x20,
     WithTofu = 0x40,
     WithKeygrip = 0x80,
-    WithSecret = 0x100
+    WithSecret = 0x100,
+    ForceExtern = 0x200,
+    LocateExternal = Locate|ForceExtern,
+
+    KeyListModeMask = 0x3ff
 };
 
 enum SignatureMode { NormalSignatureMode, Detached, Clearsigned };
diff --git a/lang/cpp/src/util.h b/lang/cpp/src/util.h
index 423973a8..cb6df0d0 100644
--- a/lang/cpp/src/util.h
+++ b/lang/cpp/src/util.h
@@ -89,19 +89,15 @@ static inline gpgme_keylist_mode_t add_to_gpgme_keylist_mode_t(unsigned int oldm
     if (newmodes & GpgME::WithSecret) {
         oldmode |= GPGME_KEYLIST_MODE_WITH_SECRET;
     }
+    if (newmodes & GpgME::ForceExtern) {
+        oldmode |= GPGME_KEYLIST_MODE_FORCE_EXTERN;
+    }
 #ifndef NDEBUG
-    if (newmodes & ~(GpgME::Local |
-                     GpgME::Extern |
-                     GpgME::Signatures |
-                     GpgME::SignatureNotations |
-                     GpgME::Validate |
-                     GpgME::Ephemeral |
-                     GpgME::WithTofu |
-                     GpgME::WithKeygrip |
-                     GpgME::WithSecret)) {
+    if (newmodes & ~(GpgME::KeyListModeMask)) {
         //std::cerr << "GpgME::Context: keylist mode must be one of Local, "
         //"Extern, Signatures, SignatureNotations, Validate, Ephemeral, WithTofu, "
-        //"WithKeygrip, WithSecret, or a combination thereof!" << std::endl;
+        //"WithKeygrip, WithSecret, ForceExtern, or a combination thereof!"
+        //<< std::endl;
     }
 #endif
     return static_cast<gpgme_keylist_mode_t>(oldmode);
@@ -137,6 +133,9 @@ static inline unsigned int convert_from_gpgme_keylist_mode_t(unsigned int mode)
     if (mode & GPGME_KEYLIST_MODE_VALIDATE) {
         result |= GpgME::Validate;
     }
+    if (mode & GPGME_KEYLIST_MODE_FORCE_EXTERN) {
+        result |= GpgME::ForceExtern;
+    }
 #ifndef NDEBUG
     if (mode & ~(GPGME_KEYLIST_MODE_LOCAL |
                  GPGME_KEYLIST_MODE_EXTERN |
@@ -146,7 +145,8 @@ static inline unsigned int convert_from_gpgme_keylist_mode_t(unsigned int mode)
                  GPGME_KEYLIST_MODE_WITH_TOFU |
                  GPGME_KEYLIST_MODE_WITH_KEYGRIP |
                  GPGME_KEYLIST_MODE_EPHEMERAL |
-                 GPGME_KEYLIST_MODE_VALIDATE)) {
+                 GPGME_KEYLIST_MODE_VALIDATE |
+                 GPGME_KEYLIST_MODE_FORCE_EXTERN)) {
         //std::cerr << "GpgME: WARNING: gpgme_get_keylist_mode() returned an unknown flag!" << std::endl;
     }
 #endif // NDEBUG
diff --git a/lang/cpp/tests/run-getkey.cpp b/lang/cpp/tests/run-getkey.cpp
index 35b15eb2..67ca281c 100644
--- a/lang/cpp/tests/run-getkey.cpp
+++ b/lang/cpp/tests/run-getkey.cpp
@@ -60,6 +60,8 @@ show_usage (int ex)
          "  --ephemeral      use GPGME_KEYLIST_MODE_EPHEMERAL\n"
          "  --validate       use GPGME_KEYLIST_MODE_VALIDATE\n"
          "  --locate         use GPGME_KEYLIST_MODE_LOCATE\n"
+         "  --force-extern   use GPGME_KEYLIST_MODE_FORCE_EXTERN\n"
+         "  --locate-external use GPGME_KEYLIST_MODE_LOCATE_EXTERNAL\n"
          , stderr);
   exit (ex);
 }
@@ -116,6 +118,12 @@ main (int argc, char **argv)
         } else if (!strcmp (*argv, "--locate")) {
             argc--; argv++;
             mode |= KeyListMode::Locate;
+        } else if (!strcmp (*argv, "--force-extern")) {
+            argc--; argv++;
+            mode |= KeyListMode::ForceExtern;
+        } else if (!strcmp (*argv, "--locate-external")) {
+            argc--; argv++;
+            mode |= KeyListMode::LocateExternal;
         } else if (!strncmp (*argv, "--", 2)) {
             show_usage (1);
         }
diff --git a/lang/cpp/tests/run-keylist.cpp b/lang/cpp/tests/run-keylist.cpp
index 54577396..9446257f 100644
--- a/lang/cpp/tests/run-keylist.cpp
+++ b/lang/cpp/tests/run-keylist.cpp
@@ -61,6 +61,8 @@ show_usage (int ex)
          "  --ephemeral      use GPGME_KEYLIST_MODE_EPHEMERAL\n"
          "  --validate       use GPGME_KEYLIST_MODE_VALIDATE\n"
          "  --locate         use GPGME_KEYLIST_MODE_LOCATE\n"
+         "  --force-extern   use GPGME_KEYLIST_MODE_FORCE_EXTERN\n"
+         "  --locate-external use GPGME_KEYLIST_MODE_LOCATE_EXTERNAL\n"
          , stderr);
   exit (ex);
 }
@@ -117,6 +119,12 @@ main (int argc, char **argv)
         } else if (!strcmp (*argv, "--locate")) {
             argc--; argv++;
             mode |= KeyListMode::Locate;
+        } else if (!strcmp (*argv, "--force-extern")) {
+            argc--; argv++;
+            mode |= KeyListMode::ForceExtern;
+        } else if (!strcmp (*argv, "--locate-external")) {
+            argc--; argv++;
+            mode |= KeyListMode::LocateExternal;
         } else if (!strncmp (*argv, "--", 2)) {
             show_usage (1);
         }