diff --git a/cmake_targets/tools/build_helper b/cmake_targets/tools/build_helper
index 49edfa91e8..eeffc9d4f1 100755
--- a/cmake_targets/tools/build_helper
+++ b/cmake_targets/tools/build_helper
@@ -575,7 +575,7 @@ install_asn1c_from_source(){
     # Showing which version is used
     git log -n1
     autoreconf -iv
-    ./configure --prefix /opt/asn1c/
+    CFLAGS="-O2 -fno-strict-aliasing" ./configure --prefix /opt/asn1c/
     make -j`nproc`
     $SUDO make install
     cd -