diff --git a/src/gpgme.c b/src/gpgme.c
index bbfcddcb..b0ef03cf 100644
--- a/src/gpgme.c
+++ b/src/gpgme.c
@@ -357,7 +357,7 @@ gpgme_set_sub_protocol (gpgme_ctx_t ctx, gpgme_protocol_t protocol)
 }
 
 
-gpgme_error_t
+gpgme_protocol_t
 gpgme_get_sub_protocol (gpgme_ctx_t ctx)
 {
   TRACE2 (DEBUG_CTX, "gpgme_get_sub_protocol", ctx,