diff --git a/package/libkcapi/libkcapi.mk b/package/libkcapi/libkcapi.mk
index 60b3f94388..09c5c028bc 100644
--- a/package/libkcapi/libkcapi.mk
+++ b/package/libkcapi/libkcapi.mk
@@ -15,6 +15,7 @@ LIBKCAPI_CONF_ENV = \
 	ac_cv_path_DB2PDF="" \
 	ac_cv_path_DB2PS="" \
 	ac_cv_path_XMLTO=""
+LIBKCAPI_MAKE_OPTS = CPPFLAGS="$(TARGET_CPPFLAGS)"
 
 ifeq ($(BR2_PACKAGE_LIBKCAPI_ENCAPP),y)
 LIBKCAPI_CONF_OPTS += --enable-kcapi-encapp