diff --git a/meta-networking/recipes-support/ntopng/ndpi_3.4.bb b/meta-networking/recipes-support/ntopng/ndpi_3.4.bb
index 1e41537799..22e4d8e9ae 100644
--- a/meta-networking/recipes-support/ntopng/ndpi_3.4.bb
+++ b/meta-networking/recipes-support/ntopng/ndpi_3.4.bb
@@ -17,6 +17,8 @@ S = "${WORKDIR}/git"
 
 inherit autotools-brokensep pkgconfig
 
+CPPFLAGS += "${SELECTED_OPTIMIZATION}"
+
 do_configure_prepend() {
     ${S}/autogen.sh
 }