diff --git a/src/include/lib3270.h b/src/include/lib3270.h
index 4bbb7a9..5af7158 100644
--- a/src/include/lib3270.h
+++ b/src/include/lib3270.h
@@ -770,7 +770,7 @@
 	LIB3270_EXPORT int lib3270_toggle(H3270 *h, LIB3270_TOGGLE ix);
 
 	LIB3270_EXPORT void lib3270_set_session_id(H3270 *hSession, char id);
-	LIB3270_EXPORT void lib3270_get_session_id(H3270 *hSession);
+	LIB3270_EXPORT char lib3270_get_session_id(H3270 *hSession);
 
 	/**
 	 * @brief IO flags.
diff --git a/src/lib3270/session.c b/src/lib3270/session.c
index 80a1867..cb245d1 100644
--- a/src/lib3270/session.c
+++ b/src/lib3270/session.c
@@ -434,7 +434,7 @@ LIB3270_EXPORT void lib3270_set_session_id(H3270 *hSession, char id)
 	hSession->id = id;
 }
 
-LIB3270_EXPORT void lib3270_get_session_id(H3270 *hSession)
+LIB3270_EXPORT char lib3270_get_session_id(H3270 *hSession)
 {
 	CHECK_SESSION_HANDLE(hSession);
 	return hSession->id;
--
libgit2 0.21.2