diff --git a/gpgmeplug/ChangeLog b/gpgmeplug/ChangeLog
index c5f39fe9..2735e87e 100644
--- a/gpgmeplug/ChangeLog
+++ b/gpgmeplug/ChangeLog
@@ -1,3 +1,7 @@
+2001-11-29  Marcus Brinkmann  <marcus@g10code.de>
+
+	* gpgmeplug.c (checkMessageSignature): Add call to gpgme_set_protocol.
+
 2001-11-24  Marcus Brinkmann  <marcus@g10code.de>
 
 	* Makefile.am (libgpgsmplug_la_SOURCES): Fix source file.
diff --git a/gpgmeplug/gpgmeplug.c b/gpgmeplug/gpgmeplug.c
index 32d9efe1..4d182bab 100644
--- a/gpgmeplug/gpgmeplug.c
+++ b/gpgmeplug/gpgmeplug.c
@@ -832,6 +832,7 @@ bool checkMessageSignature( const char* ciphertext,
     const char* fpr;
 
     gpgme_new( &ctx );
+    gpgme_set_protocol (ctx, GPGMEPLUG_PROTOCOL);
     gpgme_data_new_from_mem( &datapart, ciphertext,
                              1+strlen( ciphertext ), 1 );
     gpgme_data_new_from_mem( &sigpart, signaturetext,