diff --git a/src/libopensc/card-gids.c b/src/libopensc/card-gids.c
index c9a1c350..d47cf371 100644
--- a/src/libopensc/card-gids.c
+++ b/src/libopensc/card-gids.c
@@ -1053,7 +1053,7 @@ gids_get_container_detail(sc_card_t* card, sc_cardctl_gids_get_container_t* cont
 	memset(container, 0, sizeof(sc_cardctl_gids_get_container_t));
 	container->containernum = num;
 
-	if (!records[num].bFlags & CONTAINER_MAP_VALID_CONTAINER) {
+	if (!(records[num].bFlags & CONTAINER_MAP_VALID_CONTAINER)) {
 		return SC_SUCCESS;
 	}
 	// ignore problematic containers
diff --git a/src/libopensc/card-jcop.c b/src/libopensc/card-jcop.c
index a87ea4e4..f522a59e 100644
--- a/src/libopensc/card-jcop.c
+++ b/src/libopensc/card-jcop.c
@@ -655,7 +655,7 @@ static int jcop_set_security_env(sc_card_t *card,
 	     return SC_ERROR_INVALID_ARGUMENTS;
         }
         apdu.le = 0;
-        if (!env->flags & SC_SEC_ENV_ALG_REF_PRESENT)
+        if (!(env->flags & SC_SEC_ENV_ALG_REF_PRESENT))
 	     return SC_ERROR_INVALID_ARGUMENTS;
         if (!(env->flags & SC_SEC_ENV_FILE_REF_PRESENT))
 	     return SC_ERROR_INVALID_ARGUMENTS;